Has been reading JH's communication to the P.M. [on solar spectrum] and wishes to point out that RH was the first to carry out those experiments, which are recounted in the P.M. for 1840.
Showing 1–8 of 8 items
Has been reading JH's communication to the P.M. [on solar spectrum] and wishes to point out that RH was the first to carry out those experiments, which are recounted in the P.M. for 1840.
Sends some specimens of photographs he has made by using bichromate of potash and an acid solution of nitrate of mercury. Gives details of a luminous phenomena he has seen in the S.W. and would like an explanation of it from JH.
Enlarging on the luminous phenomena he has seen in the S.W. and giving some comments from a naval officer who had observed it.
Is grateful for the very interesting photograph; will keep the preparation secret if he discovers it. Has been trying many experiments with benzoates with curious results, but bad weather has stopped progress so has now turned to thermography to test the truth of Mr. Prater's conclusions. Comments on these.
Enclosing the specimens of photographs by different methods; comments on the methods used. Encloses a paper by Were Fox.
Enclosing specimens of his chromatype; comments on how these were produced and their characteristics. Is very busy with the Annual Exhibition of the Polytechnic Society.
Has received from the P.M. proof of an article replying to the attack of [L. F.] Moser on RH, also details of a new instrument by J. W. Draper. Would like JH's opinion on the instrument. Has had some good results with the fluorates recently.
Would like his views on a name for the combination of hydrogen and chlorine. Comments on the various theories. Has replied to [L. F.] Moser.