Richard Phillips to Faraday   8 June 1821

Dear Faraday

My view of the business is as follows. Three grs of the substance gave 5.7 c. inches of carbonic acid, therefore two grs will give 3.8 cubic inches - 100 cubic inches of carbonic acid weigh 46.47 grains & contain 12.72 of carbon, therefore 3.8 grains will give 0.483 of Carbon. Now deduct 0.483 from from 2 grs the quantity used we have 1.517 grs to be accounted. We have then 5.9 grs of chloride of silver which according to Wollaston = 1.45 of chlorine. These added 0.483 the carbon give

Now Carbon is 7.5 - Chlorine 44.1 grs Wollaston¹. There is 44.1 gave 7.5, Carbon 1.45 will give 0.246, but double the carbon & we have 0.492 - nothing can be or ought to be nearer. It is evidently a subbichloride or

You may write the paper² - I am satisfied.

Yours ever | R. Phillips

Address: Mr Faraday | Royal Institution | Albemarle St

Postmark: 8 June 1821