INFLUENCE OF THE TIME OF DIGESTION.

(A) = Temperature, degrees C.

(B) = Citrate-soluble phosphoric acid.

(C) = Total phosphoric acid.

Material. Authority. (A) Time of (B) (C)

digestion. Per cent. Per cent.

Bone meal, F. B. Dancy, { 65 ½ hour 10.60 19.75

{ 65 1 “ 11.28 19.75

Orchilla F. B. Dancy, { 65 ½ “ 6.62 21.68

guano, { 65 1 “ 6.85

Navassa F. B. Dancy, { 65 ½ “ 4.64 31.27

rock, { 65 1 “ 4.81 31.27

Navassa F. B. Dancy, { 65 ½ “ 9.00 11.47

superphos., { 65 1 “ 9.21 11.47

Bone meal, H. A. Huston, { 40 ½ “ 4.01 20.28

{ 40 1 “ 5.92 20.28

Bone meal, H. A. Huston and { 65 ½ “ 6.17 23.58

raw, W. J. Jones, Jr., { 65 1 “ 6.49 23.58

{ 65 2 hours 8.22 23.58

{ 65 5 “ 9.31 23.58

Steamed H. A. Huston and { 65 ½ hour 10.59 27.67

bone, W. J. Jones, Jr., { 65 1 “ 12.21

{ 65 2 hours 14.61

{ 65 5 “ 17.94

{ 65 10 “ 19.73

Florida H. A. Huston and { 65 ½ hour 0.56 19.75

soft rock, W. J. Jones, Jr., { 65 2 hours 1.69

{ 65 5 “ 1.47

Precipitated H. A. Huston and { 65 ¼ hour 26.72 33.34

calcium W. J. Jones, Jr., { 65 ½ “ 27.26

phosphate { 65 1 “ 27.28

from glue { 65 2 hours 27.29

works,

Pamunky H. A. Huston and { 65 ½ hour 4.43 13.84

phosphate,[113] W. J. Jones, Jr.,{ 65 1 “ 8.28

{ 65 2 hours 10.34

{ 65 5 “ 11.80

{ 65 10 “ 12.58

Calcined H. A. Huston and { 65 ½ hour 21.24 45.15

Redonda, W. J. Jones, Jr.,{ 1 “ 31.70

{ 2 hours 36.92

{ 5 “ 41.00

{ 10 “ 42.70

South H. A. Huston and { 65 ½ hour 2.82 25.51

Carolina W. J. Jones, Jr.,{ 1 “ 3.13

rock, { 2 hours 3.57

{ 5 “ 3.88

Principles and practice of agricultural analysis. Volume 2 (of 3), Fertilizers · 第 31 / 71 题