(A) = Temperature, degrees C.
(B) = Quantity of material used.
(c) = Citrate-soluble phosphoric acid.
(D) = Total phosphoric acid.
Material. Authority. Time (A) (B) (C) (D)
Grams. Per cent. Per cent.
Orchilla F. B. Dancy, { ⅔ hour 40 2.0 9.94 21.68
guano, { ⅔ “ 40 1.0 12.14
{ ⅔ “ 40 0.5 13.51
{ ½ “ 65 2.0 6.62
{ ½ “ 65 1.0 9.33
Redonda, S. W. Johnson { ½ “ 40 2.0 1.70 36.68
and E. H. { ½ “ 40 0.4 3.46
Farrington, { ½ “ 65 2.0 1.85
{ ½ “ 65 0.4 5.26
South S. W. Johnson { ½ “ 40 2.0 1.32 25.48
Carolina and E. H. { ½ “ 40 0.4 1.33
rock, Farrington, { ½ “ 65 2.0 1.65
{ ½ “ 65 0.4 3.36
Orchilla T. S. Gladding,{ ½ “ 65 2.0 5.87
guano, { ½ “ 65 0.4 13.05
Calcined H. A. Huston, { ½ “ 65 0.5 16.80 45.46
Redonda, { ½ “ 65 1.0 18.26
{ ½ “ 65 2.0 21.24
{ ½ “ 65 3.0 23.22
{ ½ “ 65 5.0 24.66
{ ½ “ 65 10.0 28.64
Calcined H. A. Huston, { 5 hours 65 0.5 41.77 45.46
Redonda, { 5 “ 65 2.0 41.53
{ 5 “ 65 8.0 39.86
Pamunky H. A. Huston { 5 “ 65 0.5 11.81 13.84
phosphate, and W. J. { 5 “ 65 2.0 11.80
Jones, Jr., { 5 “ 65 4.0 11.44
Raw bone, H. A. Huston { 2 “ 65 0.5 16.49 23.58
and W. J. { 2 “ 65 2.0 8.22
Jones, Jr., { 2 “ 65 4.0 7.22
Steamed H. A. Huston { 5 “ 65 0.5 26.40 27.67
bone, and W. J. { 5 “ 65 2.0 17.94
Jones, Jr., { 5 “ 65 4.0 12.12
Precipitated H. A. Huston { 2 “ 65 0.5 33.34 33.34
calcium and W. J. { 2 “ 65 2.0 27.29
phosphate Jones, Jr., { 2 “ 65 4.0 19.49
from glue
works,
Florida H. A. Huston { 2 “ 65 0.5 5.50 19.75
soft rock, and W. J. { 2 “ 65 2.0 1.69
Jones, Jr., { 2 “ 65 4.0 1.27
Influence of Acidity and Alkalinity.
(A) = Temperature, degrees C.
(B) = 100 cc neutral citrate + citric acid.
(C) = 100 cc neutral citrate + ammonia equivalent to citric acid.
(D) = Per cent of phosphoric acid dissolved.
(E) = Per cent total phosphoric acid.