136 
CALCII PHOSPHAS PR^CIPITATUS. 
Ilharclt, W. K., found a sample of precipitated calcium phosphate 
contaminated with iron and chloride. — Proc. Am. Phar. Ass.. 1905, 
v. 53, p. 183. 
Cameron and Seidell investigated the composition of the solutions 
of solids resulting when phosphates of calcium are brought into 
contact with water. So-called tri-calcium phosphate yields an acid 
solution, the amount of phosphoric acid formed depending upon the 
original composition of the sample and the relative proportions of 
solid and water used. — J. Am. Chem. Soc., 1905, v. 27, pp. 1503-1512. 
Cameron and Bell present the results of some additional work on 
the same subject. — Ibid., pp. 1512-1511. 
CALCII SULPHAS. 
Sullivan, E. C., determined the solubility, at 25° C., of calcium 
sulphate in ammonium sulphate solution. Presents a tabulation of 
his results. — J. Am. Chem. Soc., 1905, v. 27, pp. 527-539. 
Cameron and Brown discuss the solubility of calcium sulphate in 
solutions of other salts, including those of sodium chloride, nitrate, 
and sulphate ; magnesium chloride and nitrate and ammonium 
chloride and nitrate. — (From J. Phys. Chem., v. 9, pp. 210-215.) 
Ibid., p. 387. 
CALENDULA. 
Eberle, E. G., mentions calendula as being one of the medicinal 
plants found in Texas. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 304. 
Mundy points out that calendula is specifically indicated by an 
enfeebled condition of the capillary blood vessels, cracked nipples, 
catarrhal condition of nose and throat, varicose ulcer, and suppura- 
tive disease of the middle ear. — Eclectic M. J.. 1905, v. 65, p. 349. 
CALUMBA. 
An abstract (from Pharm. J.. Lond.) points out that Alcock found 
a sample of calumba which, on incineration, yielded 16 per cent of 
ash. TCardleworth believes that the drug is the product of Tinospera 
hakis. Holmes, on the other hand, believes that the fictitious drug is 
the overground portion of the root of Jateorrhiza calumba itself. — 
Pharm. Zentralh., 1905, v. 46, p. 670. 
Francis, John M., asserts that practical experience with the fluid 
extract of calumba leads him to believe that the more concentrated 
menstruum of perhaps 80 to 85 per cent of alcohol, by volume, will 
yield a fluid extract of better appearance and one which will keep 
better than that prepared with the official menstruum. — Bull. Pharm. 
Detroit, 1905, v. 19, p. 528. 
