M. C. Lea on Estimation of Nitrogen, etc. 189 
Art. XV.—Remarks on a proposed Process for the Estimation 
of Nitrogen, and on an Acidimetric Process ; by M. CAREY Lea. 
Iw a late number of the London Chemical News* a modifica- 
tion of Will and Varrentrapp’s process for the estimation of ni- 
trogen is proposed by Mr. J. Walker. He decomposes the sub- 
stance in a combustion tube in the ordinary way, but instead of 
conducting the products of the combustion into chlorhydric acid, 
conducts them into solution of chlorid of zine, and in place of 
determining the ammonia in the usual manner, determines the 
years, and gives most accurate results, and I can with perfect 
confidence recommend it.” 
ew chemists would be apt to adopt a process so obviously 
worthless, but as its author recommends it especially for the 
analysis of manures, and as in that way it might be employed 
for technical purposes, it seems desirable that its gross inaccu- 
be added, the precipitate redissolves. Obviously if more am- 
metric Analysis, highly recommends a 
* Nov. 24, 1860, p. 280. ss 
Am. Jour. Sct.—Sxconp Szrims, Vox. XXXI, No. 92,—Maxcu, 1861 
y 5 
