136 
FLORIDA STATE HORTICULTURAL SOCIETY. 
studies; also to Chemist McMurtree’s ar¬ 
ticles in the American Fertilizer, Grif¬ 
fith’s Manures, Muir’s Chemical Ele¬ 
ments, Warrington’s Chemistry of the 
Farm and other books and publications; 
especially those issued by our state and 
the United States and sent free to all. 
FORMULA WORF 
By Mrs. N. M. G. Prange. 
Before presenting this work, I wish to 
assure those who are chafing at the 
thought of being bored by figures, that 
X shall give but two illustrations. 
All will please remember that these are 
fanciful formulas and are newt recom¬ 
mended for use. In my grove I use the 
standard formulas of trade, considering 
my conditions are in no way so peculiar 
that they cannot be met by some of the 
various formulas on the market. Know¬ 
ing these formulas are the result of years 
of patient study and trial to supply the 
needs of trees at all seasons and in all 
parts of the State, I feel it needless for 
me to go back to the beginning, trying 
perhaps what others before me have al¬ 
ready found lacking. Rather would I 
benefit by what they have learned and 
spend my time in a careful selection from 
what has proven to be of value. 
I use this formula work simply to as¬ 
certain the market value orf the plant 
food offered in a formula and trust oth¬ 
ers will do the same. 
As simple a formula as we can find can 
be made from sulphate of ammonia, dis¬ 
solved boneblack and high-grade sulphate 
of potash. We write its name “Fruit and 
Vine” at top of sheet, its percentages, 
3-6-12, at left hand corner and the cata¬ 
logue price at right of name. Our next 
step is to write the name of materials to 
be used in a column, leaving space at left 
for the number of pounds, and spaces at 
right for content in pounds of ammonia, 
phosphoric acid, and potash—for price 
per ton and for cost of quantity used, 
making in all seven different columns. 
Ammonia 3 per cent, gives 60 lbs. in 
a ton. In the State Chemist’s report we 
find sulphate of ammonia contains 25 per 
cent, ammonia and is worth $74 per 
ton. Since there are 25 lbs. Ammonia in 
one hundred pounds of the sulphate, it 
will take as many hundred pounds to sup¬ 
ply the 60 lbs., as 25 is contained in 60 
which is 2 2-5; equalling 240 lbs., or we 
can add two ciphers to the 60 and the 
answer will come in pounds—that is 25 
will go in 6,000, 240 times. We write 
“240 lbs.” before the item “Sulphate of 
Ammonia,” “60" in the column for am¬ 
monia content in pounds and $74.00 in 
column for prices per ton. The easiest 
way to reckon the cost of an irregular 
number of pounds is to multiply cost of 
one thousand pounds, or one-half ton, by 
