OP ARTS AND SCIENCES. 221 



III. 0.1740 grm. substance gave 0.3879 grm. C0 2 and 0.0857 



grm. H 2 0. 



IV. 0.2196 grm. substance gave 37.9 c.c. moist nitrogen at 21°. 5, 



and 741 mm. pressure. 



Tbe formula of tbe substance CnHnNgOa sbows that it contains 

 the elements of one molecule of phenyl hydrazine, and one of pyro- 

 mucamide, less two atoms of hydrogen. Lack of time prevented a 

 more extended study of this body, but the investigation will be 

 continued at some future time in this Laboratory. 



