LaMotte Standards 



GUARANTEED 



Section 1. — Standardized Indicator dyes. Covering a wide range of H-ion con- 

 centration. Supplied in dry form and in sterile stock solutions. Each indicator 

 is standardized in strict accordance with the specifications of Clark & Lubs. f Jr. 

 Bact., Vol. II, Nos. 1, 2, 3, 1917.) 



Section 2-B. — Specially prepared and standardized Buffer salts and solutions. 

 Buffer mixtures may be obtained in series covering any particular range of H-ion 

 concentration from Ph 1.0 to 10.0. 



Standardized Buffer Solutions (M/5) 



Potassium Phosphate Potassium Phthalate Sodium Hydroxide (COj free) 



Potassium Chloride Hydrochloric .\oid Di-Sodium Phosphate, 2HjO 



A large number of general synthetic and purified compounds are manufactured by 

 us and information concerning them may be obtained by addressing 



LA MOTTE CHEMICAL PRODUCTS CO. 



"Standardis Department" 



13 W. Saratoga St. Baltimore, Md. 



GENETICS 



A Periodical Record of Investigations Bearing on 

 Heredity and Investigation 



ISSUED BIMONTHLY 



EDITORIAL BOARD 



Gkoroe H. Shvll, Managing Editor 

 Princeton University 



WiLLi.^M E. C.\STLK Edwin G. CoNKLiN Ch.vrles B. D.wenport Bradley M. Davis 



Harvard University Princeton University Carnegie Institution of Washington University of Michigan 



Edward M. E.\ST Rollins A. Emerson Herbert S. Jennings 



Harvard University Cornell University Johns Hopkins University 



Thomas H. Mobgan Ratmond Pearl 



Columbia University Johns Hopkins University 



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