352 



SCIENCE 



[N. S. Vol. XXXIII. No. 844 



appreciative of the labor of others, and makes 

 him conscious of the meaning of the responsibility 

 of industrial service. 



Abstracts for the following papers have not 

 been received: 



" A Laboratory Course in Chemical Engineer- 

 ing," W. H. Walker and Wm. K. Lewis. 



" The Preparation of ' Known ' Solutions in 

 Qualitative Analysis," L. J. Curtman. 



" Instruction in Physical Chemistry — Two 

 Modifications," R. Stevenson. 



" Suggestions as to Certain Desirable Changes 

 in Chemical Nomenclature," Edwin Booth. 



" Quantitative Analysis as a Science," W. D. 

 Harkins. 



DIVISION OF FEETILIZEK CHEMISTET 



F. B. Carpenter, chairman 

 J. E. Breekenridge, secretary 

 The Determination of Nitrogen in Commercial 

 Ammoniates of High Nitrogen Content. Report 

 of the Committee on Nitrogen, Division of Fer- 

 tilizer Chemists: Paul Rudnick, chairman. 

 Three samples were prepared, namely, dried 

 blood, tankage and a complete fertilizer, all the 

 nitrogen of which was derived from the same lot 

 of dried blood. Forty-eight laboratories reported 

 results by all the usual methods, including an 

 average of 223 individual moisture determinations 

 and 259 individual nitrogen determinations on 

 each of the three samples. 



The results were grouped into tables according 

 to the methods employed. The results by the 

 absolute or cupridoxid method were unsatisfac- 

 tory and only one set of determinations by the 

 soda lime method was received. 



The individual variations from the arithmetical 

 means in the several tables were large, but the 

 average results of the " wet combustion " methods 

 showed a very satisfactory agreement. " 



The Kjeldahl-Gunning method gave the highest 

 results. 



Special attention is called to the necessity for 

 special precautions in the preparation and pack- 

 ing of samples representing shipments of these 

 and similar commodities, in order that changes in 

 the moisture content may be reduced to a 

 minimum. 



Abstracts for the following papers have not 

 been received: 



" The Results of Soil Investigations as Affecting 

 the Use of Fertilizers," F. B. Carpenter. 



" The Growth that Forms in Neutral Am- 

 monium Citrate," Robert A. Hall. 



" What Allowance should be made for Varia- 

 tion in Guarantee and Analysis of Fertilizer, and 

 what, if any. Credit should be given a Manufac- 

 turer for an Excess in one or more of the Ingre- 

 dients, to Offset a Deficiency in Another," R. E. 

 Rose. 



" Some Causes affecting the Accuracy of the 

 Kjeldahl and Gunning Methods for the Deter- 

 mination of Nitrogen," Ray Henry. 



" A Bacteriological Method for Determining 

 Available Organic Nitrogen," J. M. MeCandless. 



" Uniform Rules and Regulations for the Ad- 

 mission of Ammoniates throughout the Southern 

 States," J. M. MeCandless. 



"Availability of Organic Nitrogen," J. E. 

 Breekenridge. 



" The Use of Nitrate of Soda in Commercial 

 Fertilizer," Charles S. Oathcart. 



G. A. Farnham reported for the Committee on 

 Phosphoric Acid. 



J. E. Breekenridge reported for the Committee 

 on Potash. 



C. F. Hagedorn reported for the Committee on 

 Phosphate Rock. 



DIVISION OF PHAEMACEUTICAI, CHEMISTET 



A. B. Stevens, chairman 



B. L. Murray, secretary 



No abstracts were received from this division. 



" Citro-compounds of Iron," A. B. Stevens. 



" Pharmacopoeial Standardization," A. B. Ste- 

 vens. 



"Does Oil of Sassafras contain Camphor?" 

 Emerson R. Miller and G. H. Marsh. 



" Assay of Gelsemium Root," L. E. Sayre. 



B. E. Ctibet 



DUBHAM, N. H. 



THE CHICAGO ACADEMY OF SCIENCES 

 The annual meeting of the Chicago Academy 

 of Sciences was held January 10, 1911, at which 

 time Dr. T. C. Chamberlin was reelected presi- 

 dent; Mr. A. L. Stevenson, first vice-president; 

 Dr. U. S. Grant, second vice-president, and Dr. 

 Wallace W. Atwood was again made secretary. 

 The reports of the officers of the academy showed 

 that during the past year the work and the influ- 

 ence of the academy have become more strongly 

 educational. The scientific collections and ex- 

 hibits in the museum are carefully maintained 

 and will always be available for specialists to 

 study, but the museum is rapidly taking on a 

 distinctly educational policy and the exhibits are 

 being appropriately altced or replaced. 



