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Lettera di H.F. Talbot a Faraday  15 giugno 1851
 
  Faraday
15 June/51

Ye importt expttried yestdy at ye RI succd perfy – A printd paper was fastd to a disk wch was then made to revlv as rapy as poss. Ye batty was dischgd, & it was found that this momty flash was sufficly vivid to on openg ye Cama it was found to have recd an impressn – The image of yee disk had been motionless. – I am not aware of this expt having ever been made before, wch demonstrates ye possibility of ye that truly instant s photographic portraiture representation. I shd be hapy to repeat it in ye presence of ye members of ye RI & other some of our scientific men friends, but I wish first to obtain effects on a greater scale of developmt & ∴ I would should be vy glad if you would devise means of augmentg ye brilliancy of the flash. Two methods occur to me wch I submit to your judgment. (1) Profssr Hare of America says that if a flat<1> coil of copper ribbons is placed in ye circuit, the spark fm a Leyd jar is greatly incd in brilliancy. Supposing this to be equally true of a <illegible deletion> battery, wd it not be desirable to adopt it? printed letters was just as sharp as if y

(2) if the battery discharge were taken thro’ a tube lined with spirally with pieces of tinfoil, (one of wch is at ye R. Instn) would not the total effect of these nums sparks light up the room more than the single discharge does?

If an a truly instants photographic represnof an object has never been obtained before (as I imagine that it has not) I am glad that it shd have been first accomplished at the R Instn

Bel

<letter as sent>

M. Faraday Esq

Lacock Abbey, Chippenham

June 15/51

Dear Sir

The important experiment tried yesterday at the Royal Instn<2>e Camera it was found to have received an impression. The image of the printed letters was just as sharp as if the disk had been motionless. I am not aware of this experiment having ever been made before – succeeded perfectly. A printed paper was fastened to a disk, which was then made to revolve as rapidly as possible. The battery was discharged, and on opening y

I should be happy to repeat it in the presence of some of our Scientific friends, but I wish first to obtain effects on a greater scale of development and therefore I should be very glad if you would devise means of augmenting the brilliancy of the flash. Two methods occur to me which I submit to your judgment. (1) Professor Hare<3> of America says that if a flat coil of copper ribbons is placed in the circuit the spark from a Leyden jar is greatly increased in brilliancy. Supposing this to be equally true of a battery, would it not be desirable to adopt it?

(2) if the battery discharge were taken thro’ a tube lined spirally with pieces of tinfoil (one of which is at the R. Instn) would not the total effect of these numerous sparks light up the room more than the single discharge does?

If a truly instantaneous photographic representation of an object has never been obtained before (as I imagine that it has not) I am glad that it should have been first accomplished at the Royal Instn

Believe me
Dear Sir
Ever Truly Yours

H. F. Talbot

 
Note:

1. ‘flat’ added to the text later.

2. Royal Institution, London.

3. Robert Hare (1751–1858), Professor of Chemistry at University of Pennsylvania. [See DSB].

4) 15 Jun 1851     Document Number: 06429
Recipient: FARADAY Michael
Author: WHFT
Collection: The Royal Society London
Collection Number: Faraday F1M n. 137  
Collection: Lacock Abbey Collection Fox Talbot Museum Lacock