AUTHOR INDEX 



669 



Long, M. B. *Quartz mercury vapor 

 lamps, the decrease in ultra-violet 

 and total radiation with usage of. 

 169. 



LoTKA, Alfred J. *Birth-rate and 

 death-rate, relation between, and 

 rational basis of empirical formula 

 for mean length of life. 53. 



Epidemiology, contribution to 



quantitative. 73. 



LoUGHLiN, G. F. *Geology and ore de- 

 posits of the Tintic mining district, 

 Utah. 316. 



*Lamprophyre dikes near Santa- 



quin and Mt. Nebo, Utah. 228. 



*Zinc ores, oxidized, of Leadville, 



Colorado. 529. 



Lyon, M. W., Jr. flrifluenza. 55. 



flsohemagglutinin groups of men. 



178. 



Maddren, a. G. *Sulphnr deposits 



and ! each placers of southwestern 



Alaska. 631. 

 Mann, W. M. fSolomon Islands, notes 



on. 149. 

 Marsh, C. DwighT. ■\Asclepias gali- 



oides, a poisonous milkweed. 415. 

 Martin, G. C. *GeoIoi;ic problems at 



the Matanu.ska coal mines. 0.3^. 

 *Nenana coal field, Alaska, the. 



320. 

 Marvin, C. F. f Aircraft, flight of, and 



deflective influence of the earth's 



rotation. 354. 

 Mather, Kirtley F. *Oil fields of 



Allen County, Kentucky. 439. 

 Matthes, F. E. fTopographic maps, 



relief shading of. 293. 

 Mauchly, S. J. tSolar eclipse of 



June 8, 1918, some results of atmos- 

 pheric-electric observations made 



during the. 269. 

 McAtee, W. L. *Birds, attracting to 



public and semipublic places. 322. 



*Birds, how to attract in East 



Central States. 411. 



*District of Columbia, sketch of 



natural history of, with indexed 

 map. 374. 



McAtee, W. L. *Ducks, mallard, food 

 habits of the. 410. 



fPoisonous sumachs, Rhus poison- 

 ing and remedies therefor. 177. 



McBride, R. S. *To1uo1 recovery. 



203. 

 McIndoo, N. E. fOlfactory sense of 



lepidopterous larvae, the. 149. 

 McNicholas, H. J. *Eye-protective 



glasses, ultra-violet and visible 



transmission of. 380. 

 Meggers, W. F. *Neon, measurements 



of wave-lengths in the spectrum of. 



170. 



fPhotography of the red and 



infra-red solar spectrum. 140. 



Meinzer, O. E. fGround-water, quan- 

 titative methods for measuring. 



293- 



Merriam, John C. fCave hunting in 

 California. 604. 



Merrill, P. W. *Neon, measurements 

 of wave-lengths in the spectrum of. 

 170. 



Mertie, J. B., Jr. *Chromite deposits 

 in Alaska. 633. 



*Platinum-l earing gold placers 



of the Kahiltna Valley. 633. 



— — fRepeated stream piracy in the 

 Tolovana and Hess River basins, 

 Alaska. 109. 



Merwin, Herbert E. Ammonium pic- 

 rate and potassium trithionate: op- 

 tical dispersion and anomalous crys- 

 tal angles. 429. 



— ■ — ■ Bucher cyanide process for fixa- 

 tion of nitrogen. 28. 



*Cristobalite and tridymite, the 



melting points of. 103. 



*Hydrated ferric o.\ides. 628. 



• — — ■ flron-hydroxide minerals, the. 

 108. 



*Ternary system MgO-AlaOs- 



Si02. 46. 



*Ternary system CaO-MgO-Si02. 



629. 



*Wollastonite and related solid 



solutions in the ternary system 

 CaO-MgO-Si02. 630. 



