266 



(lOcc), filter through a small filter, if necessary, and test the sol. for am. 

 sulphocyanate with ferric chloride. By this process we have succeeded in 

 finding one part of hydrocyanic acid in 200,000 parts of water and organic 

 matter. The method is especially recommended in cases of toxic analysis, 

 where the ferro and ferrircyanides may be present. 



1.4 DIAMIXO-CYCLOHEXANE. By W. A. NOYES AND IT. H. BaLLARD. 



[Abstract.] 



The chloride was prepared from succinylosuccinic ester by saponification 

 with sulphuric acid formation of the dioxime, and reduction with so- 

 dium and alcohol. Solutions of a mixture of equivalent quantities 

 of the amino-chloride and sodium nitrite evolve on heating nearly 

 two atoms of nitrogen. The same is true of a solution of the amino 

 nitrite, prepared by adding silver nitrite to the amino chloride. 



The products of the reaction as deduced from their chloroplatinates 

 are 1.4 amino-hydroxy-cyclohexane and J^ tetrahydro-aniline. 



Ox A CASE OF STEREO-ISOMERISM IN THE HYDRAZONES OF BENZOIN. By ALEX- 

 ANDER S.MITH. 



Only four or five cases of isomerism have as yet been discovered among 

 the hydrazones. In each case the two isomers are made in a similar man- 

 ner and possess similar chemical properties, indicating identity in constL- 

 tution. In each case, however, the isomers may be distinguished by dif- 

 ference in solubility, melting point and stability. The two hydrazones of 

 benzoin described in this paper are related to each other in the same way, 

 and, therefore, fall into line with the previously described cases. 



Both are formed when benzoin and phenylhydrazine are heated in 

 alcoholic solution, while the y5-hydrazone alone is produced when the in- 

 gredients are heated without any solvent. 



The «-hydrazone melts at 158°-159°, is very stable in comparison with 

 the other variety, and is only one-fourth as soluble in alcohol. 



