INDEX 



629 



Optics. *Axial aberrations of lenses. 



E. D. Tillyer and H. I. Schultz. 



585. 

 Dispersion and other optical prop- 

 erties of carborundum. H. E. 



Merwin. 445. 

 fMother-of-pearl, colors of. A. H. 



Pfund. 236. 

 *Reflecting power of tungsten and 



stellite. W. W. Coblentz and 



W. B. Emerson. 561. 

 "("Rotation of the plane of polariza- 

 tion in quartz and iron at high 



temperatures. Frederick Bates 



and F. P. Phelps. 473. 

 fTurbidity, a standard of. P. V. 



Wells. 473. 

 Ornithology. fAdditions to list of 



North American birds. H. C. 



Oberholser. 120. 

 *Anatidae, a new genus of. H. C. 



Oberholser. 589. 

 *Aphelocoma cyanotis and its allies, 



status of. H. C. Oberholser. 



588. 

 fChanges in avifauna about Bur- 

 lington, Iowa. Paul Bartsch. 



166. 

 *Bombycilla garrula, synopsis of 



races of. H. C. Oberholser. 



590. 

 *Culebra Island, Porto Rico, birds 



of. Alexander Wetmore. 588. 

 *Fringilline genus Passerherbulus 



and its nearest a'lies. H. C. 



Oberholser. 588. 

 New laniine family of Passeri- 



formes. H. C. Oberholser. 180. 

 *Notes on North American birds. 



I. H. C. Oberholser. 589. 

 New pycnonotine family of Passeri- 



formes. H. C. Oberholser. 537. 

 *Sialia from Mexico, new. H. C. 



Oberholser. 589. 

 *Sitta carolinensis, the eastern sub- 

 species of. H. C. Oberholser. 



590. 

 References. 497, 569. 



Paleontology. *Brachyceratops, a ce- 

 ratopsian dinosaur from the Two 

 Medicine formation of Montana. 



C. W. Gilmore. 267. 



*Fauna of the Mount White for- 

 mation. C. D. Walcott. 565. 



fGastroliths in the Cloverly forma- 

 tion. C. J. Hares. 429. 



*North American Upper Cretaceous 

 corals of the genus Micrabacia. 

 L. W. Stephenson. 39. 



*Plants from the Triassic of Penn- 

 sylvania. E. T. Wherry. 393. 



fSeacow of Maryland, fossil. Wil- 

 liam Palmer. 120. 



References. 490. 

 Petrology. "("Results of microscopic 

 examination of rocks from oil 

 fields of southeastern Ohio. M. I. 

 Goldman. 310. 



Photometry. *"Average eye" for het- 

 erochromatic photometry. E. C. 

 Crittenden and F. K. Richt- 



MYER. 264. 



fNormal eye for photometry of 

 lights of different color. A. H. 

 Taylor. 17. 

 Physics. "(Calorimeter for determi- 

 nation of latent and specific heats 

 of fluids. N. S. Osborne. 22. 



fElastic strain, effect of, on equilib- 

 rium temperature of a solid and 

 its liquid. E. Buckingham; E. 



D. Williamson. 79. 



Elastic systems, the vibration fre- 

 quencies of. M. D. Hersey. 437. 



"("Liquids, constitution of. Irving 

 Langmuir. 474. 



Luminescence measurements. N. 



E. Dorsey. 1. 



*Mercury, freezing point of. R. M. 



WlLHELM. 13. 



*Mercury vapor pump, two-stage. 



H. F. Stimson. 477. 

 "("Polarized light, application to the 



study of opaque substances. F. 



E. Wright. 473. 



