Showing posts with label Giovanbaptista della Porta. Show all posts
Showing posts with label Giovanbaptista della Porta. Show all posts

Wednesday, 30 July 2008

Wilkins, Lib II, Cap X "Of subterranean lamps"...

Note: this article has now moved to wilkins-lib-ii-cap-x-of-subterranean-lamps on Cipher Mysteries

Having just bought a print-on-demand copy of John Wilkins' book "Mathematical Magick: Or The Wonders That may be Performed by Mechanical Geometry", I found that it was (mostly) placed online in 2006 as part of "The Mathematical and Philosophical Works of the Right Rev. John Wilkins", (re-)published in 1802 - there's a free version on Google Books, available for free download here. If you go to page 247, you can also see his 1668 essay on a philosophical language which D'Imperio mentions in her section 9.3 "Pasigraphy: Universal and Synthetic Languages".
All the same, because I was interested in the "perpetual lamp" section of Wilkins' "Mathematical Magick", and the online text version was somewhat flawed, I thought I'd post a more usable/readable version here of Book 2 Chapter 10 (page numbers as per "Mathematical Magick"). PS: I like the animated statue story on p.237: it has a proper Indiana Jones feel to it! :-)
[p.232]
C A P. X.

Of subterraneous lamps : divers historical relations concerning their duration for many hundred years together.

Unto this kind of Chymical experiments, we may most probably reduce those perpetual lamps, which for many hundred years together have continued burning without any new supply in the sepulchres of the Ancients, and might (for ought we know) have remained so for ever. All fire, and especially flame, being of an active and stirring nature, it cannot therefore subsist without motion; whence it may seem, that this great enquiry hath been this way accomplished: And therefore it will be worth our examination to search further into the particulars that concern this experiment. Though it be not so proper to the chief purpose of this discourse, which concerns Mechanical Geometry; yet the subtility

[p.233]

and curiosity of it, may abundantly requite the impertinency.
There are sundry Authors who treat of this Subjection by the by, and in some particular passages, but none that I know of (except Fortunius Licetus) [margin: Lib. de reconaitis antiquarum Lucernis] that hath writ purposely any set and large discourse concerning it: out of whom I shall borrow many of those relations and opinions, which may most naturally conduce to the present enquiry.
For our fuller understanding of this, there are these particulars to be explained:
1. οτι, or quod sit.
2. δίοτι, / cur sit. / quomodo sit.

1. First then, for the οτι, or that there have been such lamps, it may be evident from sundry plain and undeniable testimonies: Saint Austin [margin: De Civit. Dei. l. 21 cap.6] mentions one of them in a Temple dedicated to Venus, which was always exposed to the open weather, and could never be consumed or extinguished. To him assents the judicious

[p.234]

Zanchy. Pancyrollus mentions a Lamp found in his time [margin: De deperd. Tit. 35. De operibus Dei, part 1. l. 4. c. 12.], in the sepulcher of Tullia, Cicero's daughter, which had continued there for about 1550 years, but was presently extinguished upon the admission of new air. And it is commonly related of Cedrenus, that in Justinian's time there was another burning lamp found in an old wall at Edessa [margin: Or Antioch. Licetus de Lucernis, l. 1. c. 7.], which had remained so for above 500 years, there being a crucifix placed by it, whence it should seem, that they were in use also amongst some Christians.
But more especially remarkable is that relation celebrated by so many Authors, concerning Olybius his lamp, which had continued burning for 1500 years. The story is thus: as a rustic was digging the ground by Padua, he found an Urn or earthen pot, in which there was another Urn, and in this lesser, a lamp clearly burning; on each side of it there were two other vessels, each of them full of a pure liquor; the one of gold, the other of silver. Ego chymice artis,

[p.235]

(simodo vera potest esse ars Chymia) jurare ausim elementa & materiam omnium, (saith Maturantius, who had the possession of these things after they were taken up.) On the bigger of these Urns there was this inscription:

Plutoni sacrum munus ne attingite fures.
Ignotum est vobis hoc quod in orbe latet,
Namque elementa gravi clausit digesta labore.
Vase sub hoc modico,
Maximus Olybius.
Adsit faecundo custos sibi copia cornu,
Ne tanti pretium depereat laticis.

The lesser urn was thus inscribed:

Abite hinc pessimi fures,
Vos quid vultis, vestris cum oculis emissitiis?
Abite hinc vestro cum Mercurio
Petaesato Caduceatoque,
Donum hoc maximum,
Maximus Olybius
Plutoni sacrum facit.

Whence we may probably conjecture that it was some Chymical secret,

[p.236]

by which this was contrived.
Baptista Porta [margin: Mag. Natural. l.12. c.ult.] tells us of another lamp burning in an old marble sepulcher, belonging to some of the ancient Romans, inclosed in a glass vial, found in his time, about the year 1550, in the Isle Nesis, which had been buried there before our Saviour's coming.
In the tomb of Pallas, the Arcadian who was slain by Turnus in the Trojan war, there was found another burning lamp, in the year of our Lord 1401. [margin: Chron. Martin Fort. licet. de lucern. l.1 c.11] Whence it should seem, that it had continued there for above two thousand and six hundred years: and being taken out, it did remain burning, notwithstanding either wind or water, with which some did strive to quench it ; nor could it be extinguished till they had spilt the liquor that was in it.
Ludovicus Vives tells us of another lamp, that did continue burning for 1050 years, which was found a little before his time. [margin: Not. ad August. de.Civit.Dei, l.21.c.6]
Such a lamp is likewise related to

[p.237]

be seen in the sepulchre of Francis Rosicross, as is more largely expressed in the confession of that fraternity.
There is another relation of a certain man, who upon occasion digging somewhat deep in the ground did meet with something like a door, having a wall on each hand of it; from which having cleared the earth, he forced opon this door, upon this there was discovered a fair Vault, and towards the farther side of it, the statue of a man in Armour, sitting by a table, leaning upon his left arm, and holding a scepter in his right hand, with a lamp burning before him; the floor of this Vault being so contrived, that upon the first step into it, the statue would erect itself from its leaning posture ; upon the second step it did lift up the scepter to strike, and before a man could approach near enough to take hold of the lamp, the statue did strike and break it to pieces. Such care was there taken that it might not be stolen away, or discovered.
Our learned Cambden in his description [margin: pag. 572]

[p.238]

of Yorkshire, speaking of the tomb of Constantius Chlorus, broken up in these later years, mentions such a lamp to be found within it.
There are sundry other relations to this purpose. Quod ad lucernas attinet, illae in omnibus fere monumentis inveniuntur, (saith Jutherius). In most of the ancient Monuments there is some kind of lamp, (though of the ordinary sort): But those persons who were of greatest note and wisdom, did procure such as might last without supply, for so many ages together. Pancirollus tells us, [margin: De perdit. Ti o2] that it was usual for the nobles amongst the Romans, to take special care in their last wills, that they might have a lamp in their Monuments. And to this purpose they did usually give liberty unto some of their slaves on this condition, that they should be watchful in maintaining and preserving it. From all which relations, the first particular of this enquiry, concerning the being or existence of such lamps, may sufficiently appear.

Friday, 30 May 2008

Perpetual Lamps...

At last, my copy of Arthur W.J.G. Ord-Hume's "Perpetual Motion: The history of an obsession" (which I mentioned here) has arrived, though I must admit to a certain amount of disappointment that its chapter 15 ("Perpetual Lamps") only runs from page 194 to page 199. All the same, if that is all we have, then let us pick up that baton and run with it...

Ord-Hume discusses Fortunio Liceti's "De Lunae Subobscura Luce prope coniunctiones", which turns out (I think) to be Chapter 50 (L) of his 1640 book "Litheosphorus": there's an online scan at the Wolfenbütteler Digitale Bibliothek here, though (once again) it turns out to be only some six pages long.

Though Ord-Hume mentions various bits from Della Porta, his main source seems to be the section in Bishop John Wilkins' 1648 "Mathematicall Magick, or The wonders that may be performed by Mechanical geometry" entitled "Subterraneous lamps, diverse historicall relations concerning thsir duration for many hundred years together".

I'd heard of the book before: it merits a mention on p.309 of William Eamon's enjoyable "Science and the Secrets of Nature" (1994), who notes both that it used the word "Magick" in an ironic sense, because "vulgar opinion... doth commonly attribute all such [machines and devices] unto the power of Magick", and that Isaac Newton was an "avid reader" of it [as was Christopher Wren]. Also on my bookshelf is "The Rosicrucian Enlightenment Revisited" (1999), where Paul Bembridge (in his article "Rosicrucian Resurgence at the court of Cromwell") briefly namechecks Wilkins' mention of the eternal lamp allegedly in the tomb of Christian Rosenkreutz. (It's in Yates too, of course).

[Incidentally, because Curse readers will remember my discussion of early modern wind-powered cars, I should say that Wilkins also talks about Simon Stevin's wind-wagon, and even includes a rather faked-up line drawing of it (you can see a copy of it here).]

Yes, I'd love to buy a proper copy of Wilkins' book, but... a first edition apparently went at auction earlier this year for £1000: oh, and there's a copy at B & L Rootenberg up for $3500. OK, the dollar's weak, but it's not that weak, right?

Thankfully, Kessinger Publishing sell (for rather less cash) a print-on-demand reproduction which you can buy through Amazon etc: but note that (rather unhelpfully) they've modernised the spelling of the title to "Mathematical Magic". Anyhow, I've ordered a copy, and will post a blog entry about it when it arrives...

Saturday, 17 May 2008

"Is this feeling an eternal flame?"

A quick pop-cultural aside: the song "Eternal Flame" was written by hugely successful American songwriter Billy Steinberg with Tom Kelly and Susanna Hoffs (of The Bangles). The inspiration for the song came from an eternal flame seen by Bangles' bass-player Michael Steele burning at Gracelands in Elvis Presley's memory, as well as from one at a Palm Springs synagague Steinberg had seen when very young. Though "Eternal Flame" was produced by Simon Cowell, I won't hold that against it. :-)

But historically, claims of actual eternal flames go back a very long way: in my book, I mentioned briefly that many in the Renaissance believed a "perpetual light" burned in the Temple of Vesta in Ancient Rome. Leon Battista Alberti's 1450 book "Momus" mentions (though admittedly in a fictional context) a "perpetual flame, tending itself even though no material is laid under it and no liquid poured over it", Giovanni Battista Della Porta documented many attempts at reproducing eternal flames in his Natural Magic in XX Books, while in his libro architettonico Antonio Averlino described a continuously-burning candle he saw in Sant Maria in Bagno. Another related story concerns Abbot Trithemius, who allegedly sold two "unquenchable eternall lights" to Emperor Maximilian I for 6000 crowns.

I thought this was one of those things for which there was unlikely to be any significant literature: I'd collected all the pieces together from scattered footnotes. However, recently I was inspired by Archer Quinn's, ummm, perpetual ranting to properly read through Kevin Kilty's well-known page on perpetual motion. All good stuff: and he even mentions eternal flames!

Kilty, who seems to have derived his information on this subject from Arthur Ord-Hume's 1977 book "Perpetual Motion: history of an obsession", mentions that:-
"Fortunio Liceti (1577-1657) made a lifelong study of these lamps, so many of which were supposedly found in old tombs, vaults and temples. Ord-Hume spends several pages examining ways to explain the observation of perpetual lamps. This is giving too much serious attention to a fantasy. It is likely that no one ever observed any such lamp."

(Though I should of course point out that Averlino claimed to have observed an eternal flame). Fascinating! I was not aware of Fortunio Liceti's connection with eternal flames, and so rushed to buy Ord-Hume's book as quickly as I could. I shall continue this thread when it arrives...

Saturday, 29 March 2008

Voynich proto-optics...?

I've been reading up on the pre-history of the telescope recently (hence my reviews of Eileen Reeves' Galileo's Glassworks and Albert van Helden's The Invention of the Telescope), but have omitted to mention why I thought this might be of relevance to the Voynich Manuscript.

The answer relates to Richard SantaColoma's article in Renaissance Magazine #53 (March 2007) with the title "The Voynich Manuscript: Drebbel's Lost Notebook?", which claimed to find a persuasive familial similarity between the curious jars arranged vertically in the pharma sections and Renaissance microscopes, specifically those described or designed by Cornelius Drebbel. His (updated) research also appears here.

The biggest problem with Voynich hypotheses is that, given 200+ pages of interesting stuff, it is comparatively easy to dig up historical evidence that appears to show some kind of correlation. In the case SantaColoma's webpage, this category covers the stars, the hands, braids, caps, colours, four elements, Francis Bacon's New Atlantis and handwriting matches suggested: none of these is causative, and the level of correlation is really quite low. All of which is still perfectly OK, as these parallels are only presented as suggestive evidence, not as any kind of direct proof.

It is also tempting to use a given hypothesis to try to support itself: in the 1920s, William Romaine Newbold famously did this with his own circular hypothesis, where he said that the only way that the manuscript's microscopic cipher could have been written was with the aid of a microscope, ergo Roger Bacon must have invented the microscope. All false, of course. Into this second category falls the "cheese mold", "diatoms" and "cilia" of SantaColoma's webpage: if these are to used as definitive proof of the presence of microscopy in the VMs, the level of correlation would need to be substantially higher. But these parallels are, once again, only presented as suggestive evidence, not proof.

Strip all these away, and you're still left with the real meat of SantaColoma's case: a set of striking similarities between 17th century microscopes and the curious devices in the Voynich Manuscript's pharma section. Even if (as I do) you doubt that all the colouring on the pages was original (and upon which some of SantaColoma's argument seems to rest), it's an interesting observation.

Having said that, no actual proof or means of proof (or disproof) is offered: it is just a set of observations, resting upon a relatively little-tested tranche of history, that of the microscope. Can we do better? I think we can.

Firstly, modern telescope historians (I'm thinking of Albert van Helden here, though he is far from alone in this respect) now seem somewhat dubious of the various Janssen family claims: and so I'm far from comfortable with placing the likely birth of the microscope with the Janssens in 1590. As Richard SantaColoma points out, Cornelius Drebbel is definitely one of the earliest documented microscope makers (from perhaps a little earlier than 1620, but probably not much before 1612, I would guess).

Secondly, it is likely that the power of the lenses available for spectacles pre-1600 was not great: Albert van Helden calculated that a telescope made to della Porta's (admittedly cryptic) specification could only have given a magnification of around 2x, which would be no more than a telescopic toy. I would somewhat surprised if microscopes constructed from the same basic components had significantly higher magnification.

Thirdly, the claimed presence of knurled edges in the VMs' images would only make sense if used in conjunction with a fine screwthread, to enable the vertical position of an element along the optical axis to be varied: but I'm not sure when these were invented or adapted for microscopes.

All in all, I would assert that if what is being depicted in the VMs' pharma section is indeed microscopes from the same family as were built by Drebbel from (say) 1610 onwards, there would seem no obvious grounds for dating this to significantly earlier than 1610: even if it all came directly from Della Porta, around 1589 would seem to be the earliest tenable date.

The problem is that there is plenty of art historical data which places the VMs circa 1450-1500: and a century-long leap would seem to be hard to support without more definitive evidence.

As always, there are plenty of Plan B hypotheses, each of which has its own unresolved issues:-
(a) they are microscropes/telescopes, but from an unknown 16th century inventor/tradition
(b) they are microscropes/telescopes, but from an unknown 15th century inventor/tradition
(c) they're not microscopes/telescopes, they just happen to look a bit like them
(d) they're not microscopes/telescopes, but were later emended/coloured to look like them
(e) it's all a Dee/Kelley hoax (John Dee was Thomas Digges' guardian from the age of 13)

Despite everything I've read about the early history of the telescope and microscope, I really don't think that we currently can resolve this whole issue (and certainly not with the degree of certainty that Richard SantaColoma suggests). The jury remains out.

But I can offer some observations based on what is in the Voynich Manuscript itself, and this might cast some light on the matter for those who are interested.

(1) The two pharma quires seem to be out of order: if you treat the ornate jars as part of a visual sequence, it seems probable that Q19 (Quire 19) originally came immediately before Q17 in the original binding.

(2) The same distinctive square "filler" motif appears in the astronomical section (f67r1, f67r2, f67v1), the zodiac section (Pisces, light Aries), the nine rosette page (central rosette), and in a band across the fifth ornate jar in Q19. This points not only to their sharing the same scribe, but also to a single (possibly even improvised) construction/design process: that is, the whole pharma section is not simply a tacked-on addition, it is an integral part of the manuscript.

(3) Some paint on the pharma jars appear original: but most seems to be a later addition. For example: on f99v, I could quite accept that the palette of (now-faded) paints used to colour in the plants and roots was original (and I would predict that a spectroscopic or Raman analysis would indicate that this was probably comprised solely of plant-based organic paints), which would be consistent with the faded original paint on the roots of f2v. However, I would think that the bolder (and, frankly, a little uglier) paints used on the same page were not original.

Put all these tiny fragments together, and I think this throws doubt on one key part of SantaColoma's visual argument. He claims that the parallel hatching inside the ornate jar at the top of f88r (the very first jar in Q17) is a direct indication that it is a lens we are looking at, fixed within a vertical optical structure. However, if you place Q19 before Q17 (as I believe the original order to have been), then a different story emerges. The ten jars immediately before f88v (ie at the end of Q19) all have vertical parallel hatching inside their tops, none of which looks at all like the subtle lens-like shading to which SantaColoma is referring. For reference, I've reproduced the tops of the last four jars below, with the final two heavily image-enhanced to remove the heavy (I think later) overpainting that has obscured much of the finer detail.

This is the "mouth" of the top jar on f102r: the vertical parallel hatching seems to depict the back wall of a jar, ending in a pool of faintly-coloured yellow liquid (probably the original paint).


This is the mouth of the bottom jar on f102r, which appears to have vertical parallel hatching right down, as though the jar is empty near the top (or perhaps its contents are clear).



This is the top jar on 102v, enhanced to remove the paint. I think some vertical hatching is still visible there: it would take a closer examination to determine what was originally drawn there.


This is the bottom jar on f102v, again heavily enhanced to remove paint. Vertical hatching of some sort is visible.

Monday, 17 March 2008

Review of "The Invention of the Telescope"...

It may seem a little odd to be reviewing a 31-year-old monograph, but stick with it, you'll see where I'm going soon enough...

The whole sequence starts with the review I posted here of Eileen Reeves' brand new "Galileo's Glassworks: The Telescope and the Mirror" (2008, Harvard University Press). Though overall very fascinating, one aspect of this book confused me: why it should be structured in two so radically different (dare I say almost schizophrenic?) halves. You see, while the first 50% covers the amorphous literary pre-history of the telescope, the second 50% deals with the textual minutiae of who told Galileo what and when, and what Galileo probably believed in 1608-9: so the book swings sharply from a super-broad cultural reading to an ultra-close textual reading. An uncomfortable mixture.

Now, the first half particularly intrigued me, so it made sense for me to move on to Reeves' major source for it: Albert van Helden's (1977) brief (but magisterial) "The Invention of the Telescope". If you want your own copy, there are still a couple under £25 available on BookFinder.com (though be quick, the rest are over £50).

Van Helden (for whom Dutch is his first language) had started out by translating Cornelis de Waard's relatively little-known book "De uitvinding der verrekijkers" (The Hague, 1906), which laid out a lot of new evidence on the genesis of the telescope as we know it in the Netherlands: much of the story revolved around the town of Middelburg (which held one of the largest glassworks in Europe), with nearly all key documents written in Dutch.

But de Waard's conclusions - that the telescope had probably been invented in Italy circa 1590, that Raffael Gualterrotti had built such a device in 1598, and that one of which had surfaced in Holland circa 1604, before being replicated by various spectacle-makers and inventors in 1608, leading to an unseemly patent rush - seemed to van Helden not quite to be supported by the evidence. And so he decided to take a fresh look at the documents: and his 1977 monograph was the result.

Having said that, van Helden's final conclusions are practically the same as de Waard's, though not quite as specific: that Giovanbaptista della Porta's claim to have built a telescope (to which his "Magia naturalis libri XX" (Naples, 1589), Book XVII, Chapter 10, p.269 circumspectly alludes) probably does hold up, as does Gualterrotti's claim (perhaps more weakly), though given that the best magnification possible pre-1600 would (argues van Helden) have been only around 2x, the resulting device would have been unspectacular - a telescopic amuse-bouche, rather than the Galilean feast that was to come. And so van Helden concludes that Italians (specifically della Porta) probably did invent the telescope, though they didn't realise it at the time.

Thirty years on, and I think van Helden's monograph stands as a great piece of writing: clear, lean, thoughtful, honest. Best of all, the majority of it (pp.28-64) consists of transcriptions (and English translations) of the important sections of all the relevant documents; so if you don't like his conclusions, feel free to go right to the primary sources (they're pretty much all there), knock yourself out. Perfect.

It should now be clear what I think happened with "Galileo's Glassworks". The elephant in the room (who was not mentioend, but around whom all the furniture was carefully arranged) was van Helden's monograph: this forms a bridge between Reeves' two distinct sections. And so if you add the two books together, you get what amounts to a single coherent work, going from medieval and early modern notions and claims of vision-at-a-distance and burning mirrors (Reeves), through to the myriad claims and counterclaims of the Dutch "inventors" (van Helden), through to Galileo's reception of the new device (Reeves again). At only 231 pages (with endnotes starting on p.167), Reeves' book originally felt to me to be about 60-70 pages short: how curious to find that van Helden's monograph exactly fits the dimensions of that lacuna.

In her acknowledgments, Reeves says that she "benefited most of all... from the intellectual guidance and constant friendship of Albert van Helden, whose own work... is the basis of and inspiration for my own" (p.220). I'd say that while Reeves' book gives context and consequence to van Helden's monograph, reading the former without the latter doesn't really make sense. In fact, I would strongly recommend to Harvard University Press (who publish "Galileo's Glassworks") that they negotiate with the American Philosophical Society to reprint Reeves' book with van Helden's excellent (but scarce) work as an appendix. Now that would be a book truly worthy of the International Year Of The Telescope.