??s 



\ 



;^ J^*^ obt,'5in<\i i. ^^:! Tht\>rtnu^^l yielti bv heAting 



s<"^ < t>r sus;p>en5ions ot t;\mv cids i atoclave 



at loo" WK - - iiyarx^xidcs ii»r c^irhonates. 



According: : 



j.. - . - ■> -; -s • — ^ -t ^>o' .....; 



ina>: : r^ ^eyer reaction, Koiv^\T»i^cki,Mrt"v7mski, 



"' , ia,», 171, iS^) lind th^^t the double 



>•=■ ^'-^n* ivphu"^ th:^t of copper and 



J,;..— -.itriles from dij^zonium salts, 



f>«t tHat t: — -, : salt is ims;^tisti5cton\ On 



:;^ is A very tjood catah'st for 

 ot ^ into the corresponding 



ly i;ive pot.>r yields 

 le, while 5:inc or iron 

 s,^lts hr-^ve ■ .::.■.: : ; se reactions, 



^ «e, 1919, «» 414) find 



-: - . pextndde forms an 



:\ . ':^, more especiaU>^ 



: ^ . _ . * Thus 60 per 



, _: , \ ^ ^ . ", . — -:.-■■ ;.. . ::-iU viscous OT 



^ ^^ :- .tion products 



. ^. - : : — e stronger the 



; > - - :: he cellu- 



,>; . - -..^ - - V"r no 



- 1 



i ^ >. 4 k w 



I el 



h\ , „ ; •. -;-.:; \. . - . ..•■..;. :,;;..,.:,: :>V 



\^ TK«ntrat: 



r, the 



?ing coDTer 



Caf^oi^.: ;; .' — In an eartier article (Scienoe Progress, 

 1920, S^ 5 : ^ e was made to a paper by Pktet and 

 Goudet - - ^ V -''.icosalu Since thea a paper has 

 been pc; :? Castan {Cwt^ vemd,^ 1920, V!U 

 243) de. . ,: ;^ ikh conqpound, originally de- 

 scribed .r^pared, according to these 

 authors. : ^ . - 1 55% under a pressure of 



