253 



combination, as yet undetermined, from that of the first, generio 

 atom, — a composition attempted to be expressed thus :— 



C43H23N3O, = { C,,H,, NO, 



And the appropriation of an alcohol hydrocarbon by this molecule 

 <;suse8 the production of an ammonium congener, which, in combina- 

 tion with some electro-negative element, may be thus written : — 



C«H,,NO, = |h L^x. 



In conclusion, a tabular statement is made of the products analysed 

 in course of the investigation, with the termination ium for the bases, 

 in analogy with ammonium : — 



Hydriodate of papaverine C^^ Hj^ NOg HI 



Iodide of etliylo-strychnium C^g Hj^ N^ O^ I 



Hydratedoxideof do. crystallized C^g H^y Nj O^ O, HO, + 3 aq. 



Nitrate of do. ... C^^ K^i ^2 ^4 ^Og 



Bichromate do. dried at 212° C^, U^j Nj 0^ CrO^, HCrO, 



Do. do. crystallized C^gH.„N20^CrO^,HCrO^ + 2aq. 



Platinum salt do. — C^g Hjj Nj O^ CI, Pt CI, 



Bicarbonate do. do. dry C^g K^^ Nj O^ CO3, HCO3 



Chloride of amylo- | ^^.^ ^^ ^^^. ^ ^ ^^ 



strychnium J 52 33 ^ 4 ' 



Do. do. crystallized C^j H3, N, O^ CI, HO + 7 aq. 



Nitrate of oxide do. dried at 2 12^ C^, H33 Nj 0^ NOg, HO 



Do. do. crystallized C^, H33 N^ O^ NOg.HO + lOaq. 



Bichromate do. dried at 212' C^^ ^33 N, 0^ CrO^, HCrO^. 



3. On the Mechanical Value of a Cubic Mile of Sunlight, 

 and on the possible density of the Luminiferous Medium. 

 By Professor William Thomson. 



The velocity of light being 192,000 miles per second, and the 

 mechanical value of sunlight incident perpendicularly on a square 



