PROCEEDINGS 



OF THE 



AMERICAN ACADEMY 



OF 



ARTS AND SCIENCES. 



VOL. XVIII. 



PAPERS READ BEFORE THE ACADEMY. 



I. 



DF HAR- 



MARINE BIOLOGICAL LABORATORY. 



ly. IQ \ / rf ^y 



Received 



Accession No. 9 .x~^ 

 Given by <^vP~~ ..d'^rr?::^^^ 

 Place, 



*;^*rlo book or pamphlet is to be pemoved tpom the liab- 

 oratopy tuithout the permission of the Trustees. 



[ TUR- 



fore the 

 nascent 



lade by 

 'he best 



, hoi, and 



strong sodium amalgam was allowed to stand for somewhat more than 

 a week. The alcohol, though not absolutely necessary, as the sodic 

 hydrate formed gradually brings the curcumin into solution, accel- 

 erates the action, which at best is extremely slow. After the dark- 

 red color of the sodic salt of curcumin had given place to a blackish 

 tinge, the liquid was poured off from the mercury, acidified with hydro- 



* The first paper was published in these Proceedings, Vol. XVII. p. 110. 



VOL. XVIII. (n. S. X.) 1 



