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SCIENCE. 



[N. S. Vol. XIV. No. 365. 



tory, which will contain the power and general 

 electrical machinery, the instrument shop, re- 

 frigerating plant, storage batteries, dynamos for 

 experimental purposes, and laboratories for 

 electrical measurements requiring heavy cur- 

 rents. 



The construction of the buildings will be 

 pushed as rapidly as possible, and it is ex- 

 pected that they will be ready for occupancy by 

 January 1, 1903. For the present, additional 

 quarters have been secured in the building oc- 

 cupied by the former Office of Standard Weights 

 and Measures, with a view to the organization 

 of the bureau and the immediate development 

 of the more needed extensions of the work 

 heretofore carried on, such as photometric 

 measurements, the testing of instruments for 

 determining high or low temperatures, clinical 

 thermometers, chemical glass measuring ap- 

 paratus, electrical apparatus used to measure 

 alternating currents, pressure gauges, and me- 

 teorological instruments. 



For the present, however, the work of the 

 bureau will be limited to the comparison of the 

 following standards and measuring instru- 

 ments, either for commercial or scientific pur- 

 poses : 



Length Measures. — Standard bars from 1 to 

 10 feet, or from 1 decimeter to 5 meters ; base 

 bars ; bench standards ; leveling rods ; grad- 

 uated scales ; engineers' and surveyors' metal 

 tapes 1 to 300 feet or from 1 to 100 meters. 



Weights. — From 0.01 grain to 50 pounds, or 

 from 0.1 milligram to 20 kilograms. 



Capacity Measures. — From 1 fluid ounce to 5 

 gallons, or from 1 milliliter to 10 liters. 



Thermometers. — Between 32° and 120° Fahr- 

 enheit, or 0° to 50° centigrade. 



Polariscopic Apparatus. — Scales of polari- 

 scopes, quartz control plates, and other acces- 

 sory apparatus. 



Hydrometers. — Alcoholometers, salinometers 

 and saccharometers whose scales correspond to 

 densities between 0.85 and 1.20. 



Resistances. — Coils of the following denomina- 

 tions : 1, 2, 5, 10, 100, 1,000, 10,000, 100,000 

 ohms ; low resistance standards for current 

 measurements of the following denominations : 

 0.1, 0.01, 0.001, 0.0001 ohm. Coils of resist- 

 ance boxes ; potentiometers ; ratio coils. 



Standards of Electromotive Force. — Clark and 

 other standard cells. 



Direct Current- Measuring Apparatus. — MilliT 

 voltmeters and voltmeters up to 150 volts ; 

 ammeters up to 50 amperes. 



It is the desire of the Bureau to cooperate 

 with manufacturers, scientists, and others, in 

 bringing about more satisfactory conditions 

 relative to weights and measures in the broader 

 meaning of the term, and to place at the dis- 

 posal of those interested such information rela- 

 tive to these subjects as may be in possession of 

 the Bureau. 



S. W. Steatton, 



Director. 



Washington, D. C. 



MEETINGS OF SCIENTIFIC SOCIETIES AND 

 CONVOCATION WEEK. 



We call special attention to the calendar of 

 the meetings of scientific societies which begin 

 shortly after the issue of the present number of 

 Science. They are as follows : 



The American Association for the Advancement of 

 Science. A meeting of the council will be held at the 

 Quadrangle Club, University of Chicago, on the after- 

 noon of January 1. Section H (Anthropology) will 

 meet in the Field Columbian Museum, Chitjago (De- 

 cember 31 and January 1 and 2). Tlie next regular 

 meeting of the Association will be held at Pittsburg, 

 Pa. (June 28 to July 3). A winter meeting is plan- 

 ned to be held at Washington during the convocation 

 week of 1902-3. 



The American Society of Naturalists Avill hold its an- 

 nual meeting afc the University of Chicago ( Decem- 

 ber 31 and January 1). In conjunction with it will 

 meet the Naturalists of the Central States and several 

 affiliated societies, including the American Morpho- 

 logical Society (beginning on January 1) ; The Amer- 

 ican Physiological Society (December 30 and 31) ; 

 The American Psychological Association and the 

 Western Philosophical Association (December 31 and 

 January 1 and 2) ; The Society of American Bacteriol- 

 ogists (December 31 and January 1), and The Amer- 

 ican Association of Anatomists (December 31 and 

 January 1 and 2). 



The Astronomical and Astrophysical Society of 

 America will meet in Washington (beginning on 

 December 30). 



The Geological Society of America will meet at 

 Eochester, N. Y. (December 31 and January 1 and 2); 



