180 FE. H. Storer—Scheenbein’s Test for Nitrates, 
ing the test (ammonium-ferrous sulphate and iodo-zine-starch) 
to acidulated water, that had not been in contact with cad- 
m 
were to be tested for a nitrate, the cadmium was removed, the 
have been present in the first portion had been completely ex- 
pelled by the boiling, while much of the peroxide of hydrogen 
t 
gether useless in delicate experiments to apply, in the presence 
of peroxide of hydrogen, that method of testing for a 
sequent testing, with iodo-starch plus acid, for nitrous are! 
the distillate. The following experiments will illustrate * 
importance of this consideration. Two portions of pure peck 
each of 250 c.c., were taken, and one was distilled directly 71 
_ {Compare Gmelin-Kraut’s Handbuch der Chemie, 1872, i (ate Abtb.), p- 58. 
ele Tecognized, 1 believe, by Schcenbein. Bea Will's Gahresbericht 1966, 
¢ Frosenius’s Zeitschrift analyt. Chemie, 18¥5, xiv, 141. 
Pe, 
