CONSENTS 
Paige 
Genetics!- "Linkage Variation and Chromosome Maps . By A. H. Sturtevant 181 
Paleontology' — Origin and History op the Bear Family in The Western 
Hemisphere? with Particular Reference ' to the Relation op This 
Question to Pr^^Ems op Geographical History . By J. C. Merriam 183 
Biology. An UnidentIi- 1 ^ 0 Base among the Hydrolytic Products op 
Gelatin . . . . By D. D. Van Slyke and A. Hiller 185 
Genetics.— Genetical and Cytolo^A™ 1 * Proof of Non-disjunctio^f the • 
• Fourth Chromosome op Drosophila Melandga^- .■ ._• By. C. B. BHdges 186 
Biology. — Note on the Economic Conversion Factors of En1£3£? 
By A. J. LotSoT"'^jS^ 
Genetics. — The Behavior of Homologous Chromosomes in a Triploid Canna 
By J. Belling 197 
Physics. — The Destruction of Phosphorescent Zinc Sulfu>es by Ultra 
Violet Light . . . . By L. B. Loeb and L. Schmiedeskamp 202 
Physics. — Acoustic Pressure Distributions, Chiefly in Reservoirs and 
in Pipes By C. Bams 207 
Genetics. — The Prediction of Annual Egg Production from the Records 
op Limited Periods 
By J. A. Harris, W. F. Kirkpatrick and A. F. Blakeslee 213 
♦ i 
