F. H. Storer—Ammonia a contaminant of Sulphuric Acid. 441 
evolved from copper clippings, was passed into dilute nitric 
acid (sp. gr. 1°15) for a couple of hours no ammonia could be 
detected in the liquid. The experiment of Schcenbein* more- 
over is to be remembered, in which ammonia, as well as 
sulphurous and sulphuric acids, was detected in water above 
which sulphur had been burned in the air. It would seem to 
be plain, however, that the substances previously mentioned 
must usually be the most efficient agents for the production of 
the ammonia. 
Were received in graduated tubes and tested successively with 
essler’s reagent until they ceased to show any coloration. 
100 grams (or c.c.) of the 
N 
0°00035 
i ) ro Seeger 
Ditto from a carboy of pure acid from Bayside Alkalistm tess than 
the agg 
‘ _ UO, 
iladelphia, 10 c. c. gave no reaction for ammonia, -_ 0-00000 
pala, ar : 
> from Trommsdorff, gave strong smell of am- 
monia when heated with lime. The much 
ammonia that it could not be estimated by the Nessler 
test, when 10 grams of the alum were operated upon,_ much. 
* Journ. prakt, Chemie, Ixxxyi, 145. + Gmelin’s Handbook, ii, 183. 
Am, Jour. Sct.—Turrp — Vou. X, No. 60.—Dec., 1875, 
