FLORIDA STATE HORTICULTURAL SOCIETY. 
141 
Anthony, made by Mr. P. Jumeau, man¬ 
ager of the plant, gave the following:* 
Silica . 
Iron and alumina 
Calcium phosphate 
Not accounted for 
No. 1. 
No 
.2. 
58 
.95 
60. 
10 
11 
.70 
11 . 
20 
27 
.92 
26. 
80 
1 
.43 
1 . 
90 
100 . 100 . 
Mr. Jumeau estimates that in this plant 
approximately four tons of material are 
handled in order to obtain one ton of 
high grade rock phosphate (77 per cent). 
In other words, of the material taken 
from the pit three-fourths carrying 
about 27 per cent calcium phosphate goes 
into the dump, while one-fourth carry¬ 
ing 77 per cent calcium phosphate is 
saved. It is thus seen that of the total 
phosphate taken from the pit in this in¬ 
stance fully one-half goes into the dump. 
"Composition des Gisements de Phosphate de 
Chaux des Etats-Unis, Paris, 1906. 
From these analyses it is apparent that 
a very large amount of Florida phos¬ 
phate is being lost annually. Methods 
of utilizing these floats, or of reclaim¬ 
ing this waste if such can be devised are 
clearly of the greatest importance both 
to the phosphate producers and to the 
agricultural interests. Phosphoric acid 
is a soil essential, and any permanent 
system of agriculture must provide a 
phosphoric acid supply. With the ex¬ 
tension of agriculture necessary to sup¬ 
port increased population, together with 
and naturally rich soils there arises in¬ 
creased demands upon the phosphate sup¬ 
ply. At the present time this demand is 
coming chiefly from the older countries 
of Europe. The time is not far distant, 
however, when an equally strong demand 
will come from the exhausted soils of 
our own country. 
