188 REPORT OF THE CHEMIST OF THE 
portant fertilizing constituents nitrogen and phosphoric acid. 
The proportions of these constituents vary greatly according 
to the proportions of meat and of bone used in the mixture, and 
also according to the amount of moisture left in the materials, 
which is well illustrated by the figures given below. 
TABLE I[V.— ANALYSES OF MEAT MEAL AND TANKAGE. 
Se a ma fee UIE RCE erence ee 






Number : Phos- | Number : Phos- 
of Nitro- | phoric of ess phoric 
sample Ber. acid: sample. Soe acid 
Per ct Per ct Per ct. Per ct. 
are es Meat meal.... 6 alike outs (00°... Lanka ceinmmaaes 4.69 12.69 
16 ey ankiare tear 4.54 DOPOD Mind aires. OO ne 3.53 16.57 
30 ena ote LD eae Rahel oane 1.44 PAA: holed anes AACE te 4.64 7.16 
Giasaye 4 okie 5.14 182722 1h Sit oe ars ; ote eae 4.70 14.19 
O39 e 4 PL. 3.56 Zor le 



1Moisture 53.4 per ct. 

V. COMMERCIAL POTASH SALTS. 
The salts of potash most commonly used for fertilizing pur- © 
_ poses are the muriate and sulphate. When chemically pure, 
the sulphate contains, the equivalent of 54 per ct. of potash, 
and the muriate 63 per ct. The high grades of sulphate and 
muriate found in the market contain the equivalent of about. 
50 per ct. of actual potash. These salts absorb moisture 
readily, and samples usually contain considerable moisture when 
the percentage of potash falls below 50 per ct. Kainit is an - 
impure form of sulphate,’ containing considerable amounts of 
salt and other impurities... Good kainit contains 11 or 12 per 
ct. of potash. In the samples examined, the potash varied 
from 11.79 to 14.05 per ct. The potash in the samples of muriate 
varied from about 48 to 58 per ct., while in case of the sulphate, 
there was only a little variation from 50 per ct. | 

