138 
FLORIDA STATE HORTICULTURAL SOCIETY. 
and mixing and bagging $1.50 making 
a total of $34.18. If the catalogue price is 
much in excess of this we shall look for a 
lower priced dealer for we are buying 
standard materials and there is no effi¬ 
cacy in the name on the bag. Still we 
must remember a ton of this analysis of 
these materials 'costs the manufacturer 
some more than we have figured for he is 
obliged to give excess over guarantee to 
make sure the analysis will actually test 
as guaranteed and besides he has to deal 
in round numbers and cannot weigh out 
these odd amounts as we have figured. 
However, all manufacturers have to meet 
these conditions so our work is as fair to 
one as another and does very well for 
what we intend it. When completed it 
should look like this: 
4-G-2-8 
PERUVIAN MANURE. 
$40.00 
A. 
P.A. 
P. 
900 lbs. 
Peruvian Guano . 
.31.50 
144.00 
18.00 
$32.00 
$11.40 
73 lbs. 
Ground Bone . 
. 2.92 
16.06 
32.00 
1.17 
100 lbs. 
Sulphate of Ammonia . . . . 
.25. 
74.00 
3.70 
122 lbs. 
Nitrate of Soda. 
..20.74 
60.00 
3.66 
547 lbs. 
L. G. Sulphate of Potash. 
142.22 
30.00 
8.20 
258 lbs. 
Land Plaster. 
12.00 
1.55 
Mixing and Bagging . 
1.50 
2,000 lbs. 
20 ) 80.16 
160 06 
160.22 
$34.18 
4 — 
8 — 
8 — 
Wle have divided the contents in pounds of the different plant foods by 20 because there are 
20 hundred in a ton and this would give the number of pounds in each hundred or in other words 
the per cents. 
PRODUCTION OF PHOSPHATE ROCK IN FLORIDA. 
By E. H. Sellards, State Geologist. 
The first attempt to use Florida phos- 
Pha tes as a fertilizer, so far as the writer 
has been ahle to learn, was made by Dr. 
C. A. Simmons, of Hawthorne, Fla. Dr. 
Simmions is said to have recognized the 
phosphatic character of certain deposits 
lying near Hawthorne as early as 1879, 
and to have operated a mill for grinding 
pebble phosphate for direct application to 
soils as early as 1883 or 1884. In 1880 
Professor E. A. Smith collected samples 
from a quarry being operated for build¬ 
ing stone by Dr. Simmons. Analyses of 
these samples made at Washington under 
the direction of the Census Bureau 
showed this building- rock to contain 12 
to 13 per cent, phosphoric acid.* 
*IIawes, G. W.j Nat. Mus. Proc., 1883. Smitk, 
E- A., U. S. 10 th Census, Vol X., 1883 . 
The mill operated by Dr. Simmons was 
subsequently abandoned, and the produc¬ 
tion of phosphate on a commercial scale 
is commonly accepted as dating from the 
first shipment of river pebble from Peace 
River in 1888. 
The phosphates of Florida are known 
in the market as hard rock phosphate^ 
land pebble phosphate, and river pebble 
