“…Numerous investigations have been carried out on the derivatives of aldehydes. Studies are reported on the oximes of formaldehyde (58) and acetaldehyde (786); the semicarbazones of formaldehyde, acetaldehyde, crotonaldehyde, butyraldehyde, and acrolein (147)', the hydrazones from formaldehyde, acetaldehyde, benzaldehyde, furfural, and acetone and isonicotinic hydrazide (867); and the Schiff's bases of isobutyraldehyde with methyl, ethyl, and «-butyl amines (4); and of acetaldehyde, butyraldehyde, and hexaldehyde with ethylene diamine and hexamethylenediamine (257).…”