34 



SCIENCE 



[N. S. Vol. XXXIX. No. 1018 



material brilliant phospliorescenee occurred. 

 The same results were obtained with anhydrous 

 chloroform, ethyl alcohol, acetone and carbon 

 tetrachloride. The material is therefore in- 

 soluble in fat solvents. 



It is most likely a protein but belongs 

 among the proteins insoluble in water. By 

 means of a specially constructed apparatus I 

 was able to extract with oxygen-free distilled 

 water and to filter the extract in an oxygen- 

 free space. On admitting air the filtrate did 

 not glow, but the filter paper showed innumer- 

 able bright dots. The granules of luminous 

 substance are therefore insoluble in water. A 

 lack of material has prevented extraction with 

 other protein solvents, salt solution, acids and 

 alkalies. 



E. Newton Harvey 



Peinceton, N. J., 



TEE AMEBICAN CHEMICAL SOCIETY. II 



DIVISION OF FERTILIZER CHEMISTRY 



J. E. Breekenridge, Chairman 

 F. B. Carpenter, Secretary 

 Chairman's Address: Chemistry an Important 

 Factor in the Fertiliger Industry: J. E. Breck- 



ENBIDGE. 



The Preparation of Neutral Ammonium Citrate: 

 Ekmon D. Eastman and Joel H. Hildebrand. 

 The proposed method depends on the prepara- 

 tion of a standard sodium phosphate solution of 

 known hydrogen ion eoneentration and the com- 

 parison of the color produced by rosolic acid in 

 this solution with that produced by the same indi- 

 cator in the ammonium citrate solution to be 

 tested. The normal ammonium citrate solution is 

 shown by its hydrogen ion concentration to be 

 slightly acid and the authors have therefore 

 adopted the neutral rather than the normal solu- 

 tion. 



A Comparison of Neutral Ammonium Citrate with 

 Sodium Citrate and N/IO Citric Acid: Paul 

 Eudnick, W. B. Derby and W. L. Latshaw. 

 Sodium citrate proposed by Bosworth (2) can 

 be used as a substitute for the oflScial neutral am- 

 monium citrate, but N/10 citric acid obviates 

 difficulties due to highly concentrated solutions, 

 such as slowness in filtration, etc., and gives re- 

 sults which are in excellent agreement with those 

 obtained by the official neutral ammonium citrate. 



The Separation of Organic Nitrogen from Mixed 



Fertilizers: C. H. Jones. 



The method recommended depends on separation 

 by gravity in carbon tetrachloride. Tables giving 

 the behavior of various fertilizer ingredients and 

 their availability by the alkaline permanganate 

 method are included. 

 Separation of Phosphoric Acid from Lime: E. K. 



Cameron. 



A discussion of the solubility curves of potas- 

 sium and ammonium phosphates and their appli- 

 cations to practical problems. 

 Separation of Potash from Kelp (lantern) : F. K. 



Cameron. 



An illustrated description of the kelp beds and 

 the methods of harvesting so far developed. 



division op pharmaceutical chemistry 

 F. B. Eldred, chairman 

 A. P. Sy, Secretary 

 Methods of Analysis of the Forthcoming Pharma- 

 copoeia: H. W. Wiley. 

 Seasonal Variation in the Composition of the 



Thyroid Gland: Atherton Seidell and Fked- 



eric Eenger. 



The experiments upon this subject embracing 

 the period August, 1911, to August, 1912, have 

 been continued for another one-year period be- 

 ginning December 1, 1912. The evidence for the 

 seasonal variation in iodine content of the thyroid 

 gland has been confirmed, and additional data ob- 

 tained, showing that a regular change of phos- 

 phorus and ash, varying inversely with the iodine, 

 occurs. In regard to the fresh weight of the 

 glands, the results indicated a regular seasonal 

 change in the case of the beef and sheep, but not 

 with the hog. The results demonstrate the prac- 

 ticability of a standard of 0.2 per cent, iodine in 

 commercial desiccated thyroids. 

 Some Peculiarities of Present Food and Drug 



Laws: Frank O. Taylor. 

 Notes on the Determination of Antipyrine: George 



D. Beal and Duane T. Englis. 



Antipyrine and caffeine can be easily extracted 

 by chloroform from an aqueous solution three- 

 fourths saturated with sodium chloride. If the 

 liquid contains vegetable extractives, the extrac- 

 tion can be effected without emulsifieation by first 

 precipitating the coloring matter, resins, etc., with 

 lead acetate. The antipyrine may be titrated in 

 the presence of caffeine by Bougault'si method, 



^Jour. Pharm. Chem., [6], 1, 161, 11, 97. 



