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. Material. Authority. Time (A) (B) (C) (D) (E) Navassa T. S. Gladding[115]{ ½ hour 65 0.00 0.00 2.53 rock, { ½ “ 65 0.733 gm 4.87 { ½ “ 65 0.733 gm 1.22 South T. S. Gladding, { ½ “ 65 0.00 0.00 1.35 Carolina { ½ “ 65 0.733 “ 2.89 rock, { ½ “ 65 0.733 “ 1.06