ABSTRACTS 



• Authors of scientific papers are requested to see that abstracts, preferably 

 prepared and signed by themselves, are forwarded promptly to the editors. 

 Each of the scientific bureaus in Washington has a representative authorized to 

 forward such material to this Journal and abstracts of official publications 

 should be transmitted through the representative of the bureau in which they 

 originate. The abstracts should conform in length and general style to those 

 appearing in this issue. 



PHYSICS. — The work of the National Bureau of Standards on the 

 establishment of color standards and methods of color nomenclature. 

 Irwin G. Priest. Trans. Ilium. Eng. Soc. 13: 38. February 

 11, 1918. 

 This paper deals in a descriptive and enumerative way with the 

 Bureau of Standards "Color Standards Investigation." The present 

 status of color standards and color specification is considered, special 

 emphasis being placed on the lack of standards, established nomen- 

 clature, suitable instruments, etc. 



A Committee of the Illuminating Engineering Society to cooperate 

 with the Bureau in establishing standards and nomenclature is 

 proposed. I. G. P. 



ELECTRICITY. — A method for testing current transformers. F. B. 

 SiLSBEE. Bureau of Standards Scientific Paper No. 309 (Bull. Bur. 

 Stds. 14). 1917. 



In measuring large amounts of electric power it is usual to employ 

 current transformers which supply to the measuring instruments a 

 small current bearing an accurately known relation to the large current 

 to be measured. Several very accurate methods are available for 

 determining this relation between the two currents but they involve 

 the use of rather sensitive and therefore delicate apparatus. 



The present method is intended for the use of the smaller central 

 stations and laboratories which may wish to test current transformers 

 with moderate accuracy but have not the facilities for the more com- 

 plicated methods. It consists in connecting the transformer under 

 test in series with a standard calibrated transformer of the same nom- 

 inal ratio, the secondary windings also being connected in series. A 

 measuring circuit is bridged across between the transformers and 



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