364 Scientific Intelligence. 
point and filtered. The magnesia remains on the filter as carbon- 
ate, while the alkalies are present in the filtrate as carbonates per- 
ia epe 
must of course be so pure as to leave no residue on ignition. In 
the presence of sulphuric acid the method is not applicable, proba- 
diethyl anilin, methylic or ethylic aleohol and chlorhydrate of anl- 
lin being heated together. In this reaction, however, other. prod- 
ucts are formed at the same time with the salts above mentioned, 
and these have been examined by Hofmann and Martius, who 
operated upon very large quantities of material, repeating the pro 
cess twice in succession upon the same material. The very 
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It can, however, scarcely be doubted that methylic chloride a 
water are always formed first, and that methylic chloride is the # 
oe of substitution. In the basic oils submitted to exa ‘aime 
authors discovered besides dimethyl anilin four other 
oe mn aa A a a i as 
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