384 



Dr. L. S. Beale on the Minute Anatomy [June 16^ 



TetrazodijjjTienyl-amidohenzoli ^ €g N > . 



€g H,N J 



This complex body is formed when an aqueous solution of nitrate of 

 tetrazodiphenyl is mixed with aniline. It is deposited in a yellow crystal- 

 line mass, which can be recrystallized from alcohol or ether (in which it is 

 but slightly soluble), and is obtained in lancet-like plates. When heated in 

 a dry state, it is decomposed with slight explosion. Its formation is ex- 

 pressed by the equation 



Hg N„ 2NHO3 4-4€g H, N=€,, H,, Ng-f 2(€g H, N, NH93. 



Nitrate of tetrazodi- Aniline. New compound. Nitrate of aniline, 



phenyl, 



N 1 



Tetrazodiphenylimide, jj* j ^^2* 



This body is obtained in the form of slightly yellowish- tinged lustrous 

 plates, which are very difficultly soluble in cold, readily, however, in hot 

 alcohol and in ether. It combines neither with acids nor with bases. 

 Heated by itself it explodes. The following equation explains its forma- 

 tion : — 



C,, Hg N, H, Brg -f 8 NH3 Ng + 6 NH, Br. 



Tetrabromide. . Tetrazodi- 



phenylimide. 



I have not succeeded in preparing tetrazodiphenyl in a free state, nor 

 have I been able to obtain compounds of tetrazodiphenyl with bases in any- 

 thing like a well-characterized condition. I pass over the abortive experi- 

 ments made by me in this direction. 



Many of the experiments just described have been carried on in the 

 laboratory of the Boyal College of Chemistry, London, others in that of the 

 University of Marburg ; and I take this opportunity of returning my thanks 

 to Prof. Hofmann of London, and Prof. Kolbe of Marburg, for allowing 

 me the use of these institutions. 



XXI. " New Observations upon the Minute Anatomy of the Papillse 

 of the Frog^s Tongue.^' By Lionel S. Beale, M.B., F.E.S., 

 P. B.C. P., Professor of Physiology and of General and Morbid 

 Anatomy in King^s College, London; Physician to the Hospital, 

 &c. Received June 16, 1864. 



(Abstract.) 



After alluding to the observations of Axel Key, whose results accord 

 with his own more closely than those of any other observer, the author 

 refers particularly to the drawings of Hartmann, the latest writer upon the 

 structure of the papillae. According to the author, Dr. Hartmann, owing 



