I of preparing phosphotic fertilizers only half of the phosphoric acid present in the deposit reaches the fertilizer factory In the f< 
sulphuric acid and manufactured into acid phosphate— a product containing the same amount of phosphoric acid t 
1 fully twice the bulk. 
s then treated with au equal a 
( £a \ "I PHOSPHORIC 
" ffl — ffl BLAST CI FURWCE 
il? 
Km. 2.. In (lied 
'"■-■ ln 1,ul funi.in Di.>.l nt in ,-].■,■ j,,.. 1 .ti<,;. [ .ii, 1 n .■ ■.,-[, i :hy rm in- ,],.;■„,; it uf P \,, <, I,:,;,, ,,-,;,•,- ..tien f.o n: il!.-«-,| . ,.,>,. i i.\,-ui (]:«! ln:-e; .-1 r.ij in'r^-ul .'mailed In washing or purifying tho rock olimtaatefl. A^nminr' ■■• '"' "H -■■«*ni -'illn-- 
11 i ' ' ' [trwluet i a liquid containing nearly twice as much phosphoric acid (PjO s ) as acid phosphate in a little more than half the weight. THa add may be manufactured Into a number ol concentrated produc- 
o-liTO 2:1. (Face p. 5.) 
