31 Sackville St <1>
I have a paper <4> nearly ready to present to the society on a singular novelty in Optics the existence of circular crystals; I should have great pleasure in exhibiting this to you with my polarising Microscope <5> before I finish the paper & to know your opinion respecting it.
Believe me Yours very truly
H. F. Talbot
1. 31 Sackville Street, London residence of the Feildings, often used as a London base by WHFT.
2. WHFT, ‘Researches in the Integral Calculus, Part One’ Philosophical Transactions of the Royal Society of London, v. 126 pt. 1, 1836, pp.177–215.
3. Prof George Peacock (1791–1858), mathematician.
4. WHFT, ‘Observations on the Optical Phenomena of certain Crystals’, Philosophical Transactions of the Royal Society of London, v. 127 pt. 1, 1837; paper received 20 April, read 5 May 1836. [See Doc. No: 03305].
5. WHFT’s method of placing one polarizer close to the eyepiece and another below the stage increased the contrast between the subject and the background, providing him with a better method of investigating the internal structures of crystals.