TALBOT3305

British Museum
20^th June – 1836

Dear Sir,

I have directed M^r Gyde ¹ to send you the proofs of your paper, for correction, as soon as ready – Your Memoir on circular Crystals ² has been read, and I have no doubt, will be published in the Philosophical Transactions – I have tried a variety of Phosphoric acids, and only once succeeded in obtaining the circular Crystals, & those very minute, but very beautiful. – Pray tell me what precautions are requisite to ensure success – and where you got the Phos Acid, which answered best? If you will give me this information in a post or two you will oblige me – Pritchard ³ has applied your polarizing apparatus to my microscope very nicely – Brewster’s ⁴ evidence of the novelty of your crystals is very satisfactory

Ever My dear Sir, faithfully Your’s [sic]
John Geo. Children

H. F. Talbot Esqre
Lacock Abbey
Chippenham
Wilts