282 



Dr. C, R. A. Wright's Contributions to the [Apr. 11, 



but on standing, a reddish purple tinge appears, gradually becoming more 

 intense. Na 2 C0 3 throws down an amorphous white precipitate, which is 

 soluble in ether and but little changed by exposure to air. From these 

 properties, which seem to be analogous in some respects to dicodeia, in 

 others to tetracodeia, the base is considered to be intermediate between 

 these two polymerides, i. e. to be tricodeia. The crude hydrochlorate 

 of dicodeia obtained by Armstrong's process furnished on recrystallization 

 mother-liquors which, on standing over S0 4 H 2 for several weeks, gradually 

 deposited crystals, and finally became a crystalline mass wetted with a 

 viscid non-crystalline liquid : by gentle pressure in filter-paper the liquid 

 portion was separated from the crystals, which were found to be only 

 dicodeia hydrochlorate ; and finally the treacly hydrochlorate of tricodeia 

 was extracted from the papers by water. On repetition of the treatment 

 over S0 4 H 2 , no crystals were obtained even after several weeks' standing ; 

 at 100° a brittle, gummy, hygroscopic substance was obtained, of which 



0-309 grm. gave 0730 C0 2 and 0*191 H 2 0. 

 0-208 „ 0-0895 Agl. 



Calculated. 



* s Found. 





1296 



64-38 



64-43 



TT 



132 



6-56 



6-87 



N 6 



84 



4-17 





o i3 



288 



14-30 





Cl 6 



213 



10-59 



10-64 



C 1M H 12G N 6 18 , 6HC1 



2013 



100-00 





§ 2. Action of Hydrochloric Acid on the Polymerides of Godeia. 



(a) Tetracodeia. — Tetracodeia hydrochlorate was boiled for six hours 

 with a large excess of strong HC1 ; no perceptible evolution of methyl 

 chloride took place ; and on examining the resulting product no change 

 was found in the ratio of carbon to chlorine. Hence no substitution of 

 01 for OH had taken place, and apparently no action at all had ensued. 



(5) Tricodeia. — Tricodeia hydrochlorate was heated to 100° for 1| hour 

 with a large excess of strong HC1 ; on adding water to the product, a tarry 

 substance was precipitated, whereas the original tricodeia hydrochlorate is 

 readily soluble in dilute HC1 : precipitated by Na 2 C0 3 and the precipitate 

 exhausted with ether, a viscid non-crystalline hydrochlorate was obtained on 

 agitation of the ethereal extract with HCL The reactions of this product 

 appear to be identical with those of tricodeia, excepting that the reddish 

 purple tinge with Fe 2 6 appears instantaneously instead of only after 

 standing a short time. Dried at 100°, 



0-3070 grm. gave 0'756 C0 2 and 0-185 H 2 O. 

 0-2480 „ 0-1150 AgCl. 



