40 cubic inches hydrogen heated 3 oz water from 53°.5 to 80°
40 <-><-><-><-> coal gas <-><-><-> do <-><-><-><-> 53.5 to 109°
mean of three experiments each
<-><-><-><->
40 c.i: coal gas heated 3 oz water from 64° to 114°.5
40 ci olefiant gas <-><-> 3 oz <-><-><-><-> [number illegible] to 150
mean of three experiments. These are equal bulks not equal lights
<-><-><-><-><->
Olefiant gas - 970 cubic inches raised a quart of water in 21 minutes from 50° to 212°
Coal gas - 2240 cubic inches raised a quart of water in 21 minutes from 52 to 212°
<-><-><->
Dear Phillips - These are all the results I can find at present, but you will meet with some thing that may perhaps interest you at page 66 of Sir H. Davy’s 8vo on flame &c1. See also Mr. Brandes Bakerian Lecture2.
A thousand thanks to you for your kindness - I am delighted with the Names - Mr. Brande had told me of it before I got your note and thought it impossible to be better. I suppose you will not be in Grosvenor Street this Evening3, so I will put this in the post.
Our Best remembrances to Mrs. Phillips.
Yours Ever | M. Faraday
R Phillips Esq
Address: R. Phillips Esq | 9 Fenchurch Bdgs | Fenchurch Street
Postmark: 5 May 1823
BRANDE, William Thomas (1820): “On the composition and analysis of the inflammable gaseous compounds resulting from the destructive distillation of coal and oil, with some remarks on their relative heating and illuminating powers”, Phil. Trans., 110: 11-28.
DAVY, Humphry (1817b): “Some researches on flame”, Phil. Trans., 107: 45-76.
DAVY, Humphry (1818b): On the Safety Lamp for coal miners; with some researches on flame, London.
Please cite as “Faraday0196,” in Ɛpsilon: The Michael Faraday Collection accessed on