

1862.] 265 



II. 1-0415 grm.gave 1-2970 grm. CO a and 0-2860 grm. Aq. Or, 

 expressed in percentages, 



Found. Theory. 



i. n? 



C . . 33-96 33-89 



H.. 3-05 2-83 



Br. . 45-30 45'19 



The circumstance that the ethers, whether obtained from erythrin 

 or from alpha-orsellic acid, have not only the same properties and 

 percentage composition, but likewise the same atomic weights, affords 

 a very strong confirmation of the correctness of Dr. Schunck's hypo- 

 thesis. 



Orsellinate of Amyl. 



On boiling dried erythrin with amylic alcohol for several hours, 

 and removing the excess of alcohol by distillation, the residue yielded 

 on standing a crystalline mass, which, however, I was unable to free 

 entirely from resinous matter. Consequently it could not be analysed. 

 It formed platy crystals of considerable lustre. There is every reason 

 to believe, therefore, that it was the amyl-compound in question. 

 The attempt to form a bromine-derivative, which it was expected 

 might be more easily purified, did not furnish satisfactory results, 

 though such a body was apparently produced. 



Formation of Erythroglucine. 



I have already shown * that when the ethyl-compound of erythrin, 

 then known as erythric ether, is boiled with potash or baryta, 

 alcoholic vapours are given off, while orcin and erythroglucine remain 

 in the solution. I have recently found that though alpha-orsellic 

 acid, as I had already established, when boiled with alkalies yields 

 orein but no erythroglucine whatever, yet when the ethyl-compound 

 obtained from it is boiled with lime or any of the alkalies for five or six 

 hours, erythroglucine as well as orcin is produced. In order to verify 

 this very unexpected result, the erythroglucine, which was obtained 

 with all its characteristic properties, was subjected to analysis. 



Dried at 100 C, 



0-5315 grm. substance gave 0-7 6 70 grm. CO a and 0-4185 grm. Aq. 



* Philosophical Transactions, 1848, p. 74. 

 VOL. XII. U 



