New Yoke Agricultural Experiment Station. 463 
of HCL, in excess, and the whole evaporated to dryness. The residue 
is then moistened with HC1., and water added and heated on water- 
bath for a few minutes, then filtered through a tarred Gooch crucible. 
The residue is sand, silica and carbon, dried, weighed, ignited, loss 
taken as carbon, remainder as sand and silica. 
The nitrate is made up to 200 cc. and 50 cc, used in each of the 
following : A, B and C : 
A. Sulphuric Acid. 
Fifty cubic centimeters of the nitrate are made up to 100 cc, or more, 
heated to boiling, and barium chloride added and then filtered; 
precipitate is barium sulphate. 
Alkalies. 
The filtrate from the above is heated and barium hydrate added in 
excess, then filtered, washed, to filtrate I cc. ammonia is added, then 
ammonia carbonate, and heated, then about 0.5 grams oxalic acid 
added and filtered, washed thoroughly with hot water, filtrate 
evaporated to dryness, ignited gently to drive off ammonium salts, then 
dissolved in water and a few drops of HC1. added, and filtered into a 
tarred evaporator and again brought to dryness, ignited gently at low 
heat, cooled and weighed as total alkalies. 
Potash. • 
The above residue is dissolved with water in a porcelain evaporator 
and platinum chloride added, evaporated on steam bath nearly to dry- 
ness, but not enough to drive off the water of crystallization, alcohol 
(80 per cent) addetl, and allowed to stand for fifteen minutes, alcohol 
then decanted and precipitate repeatedly washed with alcohol, then 
the precipitate is brought upon a tarred Gooch crucible, washed with a 
little ether and dried at 100 C. for thirty minutes and weighed. 
Soda. 
Soda is determined by difference between potash and total alkalies. 
B. Iron and Alumina. 
Fifty cubic centimeters of the original solution were made alkaline 
withammonia then acetic acid added in excess. The precipitate may be 
fericand alumnic phosphate, but is weighed as Fes (P CH)2. 
Lime. 
The filtrate from last is heated and ammonium oxalate added, then 
allowed to stand in a warm place for a few hours and filtered, washed, 
dried, ignited intensely and weighed directly as Ca O. 
Magnesia. 
The last filtrate is made alkaline with ammonia, and then sodium 
phosphate added and allowed to stand, then filtered, washed, dried, 
ignited and weighed as Mg 3 P 2 0~. 
