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VOLUMES XXXI-XL. 



547 



Williams, G-. H., Peridotites near Peeks- 

 kill, N. T., i, 26. 



Modern Petrography, iii, 79 ; norites 

 near Peekskill, N. Y., iii, 135, 191; 

 orthoclase in no rite, iii, 243. 



serpentine at Syracuse, N. T., iv, 

 137; minerals of Baltimore, iv, 160; j 

 twin crystals of pyroxene, Orange Co., 

 N. T., iv, 275. 



gabbros and diorites of "Cortlandt 

 Series," near Peekskill, N. Y., v, 438; 

 petrographical microscope, v, 114. 



contact-metamorpbism near Peeks- 

 kill, N. Y., vi, 254. 



petrography of Fernando de No- 

 ronba, vii, 178. 



bemihedrism in tbe monoclinic sys- 

 tem, viii, 115. 



celestite from Mineral Co., W. Vir- 

 ginia, ix, 183 ; hornblende of St. Law- 

 rence Co., N. Y., ix, 352. 

 Crystallography, xl, 424. 

 Williams, H. S., Devonian Lamellibran- 

 chiata, ii, 192; Devonian system in 

 N. America, v, 51; of Devonshire, ix, 

 31. 

 Williams, J. W , eudialyte and eucolite, 



from Arkansas, xl, 457. 

 Williams, S. G-., Lower Helderberg in 



New York, i, 139. 

 Williamson, W. O, Fossil Plants of Coal 

 Measures, Pt. XIII, v, 256; Pt. XIV, 

 vi, 71. 

 Willson, R. W., mode of reading mirror 

 galvanometers, vi, 50 ; measurement 

 of internal resistance of batteries, viii, 

 465 ; magnetic field in Jefferson Phy- 

 sical Laboratory, ix, 87, 456. 

 Wilson, H. V., on Manicina areolata, vii, 



502. 

 Winchell, A., Elements of Geology, ii, 

 243 ; unconformability between Ani- 

 mikie and Vermilion series, iv, 314; 

 Shall we teach Geology? vii, 319; 

 Geological Report on Minnesota, Ar- 

 chaean rocks of the Northwest, vii, 497. 

 Winchell, N. EL, Geological and Natural 

 History Survey of Minn., vii, 231, 497 ; 

 Geological Survey of Minnesota, 1888, 

 ix, 67. 

 Wind, prevailing direction of, Hazen, iv, 

 461; vane, theory of, Curtis, iv, 44; 

 velocity and pressure, Hazen, iv, 241. 

 Wind-action in Maine, Stone, i, 133. 

 Winds, Treatise on, Ferrel, viii, 420. 

 Wings of birds, movements of, iii, 422. 

 Winkler, O, Gas-Analysis, i, 153. 

 Winnipeg Lake, ancient beaches of, viii, 



78. 

 Winterhalter, A. G., new persooal equa- 

 tion machine, vii, 116. 



Wislicenus, geometrical isomerism, vii, 

 494. 



Wittrock, Erythrsese Exsiccatae, i, 237. 



Woeikof, A., Croll's hypotheses of geo- 

 logical climates, i, 161. 



Wohler memorial, i, 320. 



Wood, J. W., Jr., geographical develop- 

 ment of northern New Jersey, ix, 404. 



Wood, T. F.. Botanical work of M. A. 

 Curtis, i, 159. 



Woodward, A. S., Catalogue of British 

 fossil Vertebrata, ix, 402. 



Woodward, B. B., Geology of England 

 and Wales, iv, 158. 



Woodward, R. S., mathematical theories 

 of the earth, viii, 337. 



Wright, G. F., Muir glacier, iii, 1 ; Ice 

 Age of North America, viii, 412. 



Y 



Yeates, W. S., pseudomorphs of native 

 copper after azurite, New Mexico, viii, 

 405 ; new localities of phenacite, ix, 

 325 ; phenacite not found at Hebron, 

 Me., xl, 259. 



Yellowstone National Park, formation 

 of geyserite deposits through the 

 agency of algae, vii, 351, 501. 



Yokoyama, M., Jurassic Plants from 

 Japan, viii, 414. 



Zoe, Biological Journal, xl, 93. 



Zoe trope, use of, in crystallography, ii, 



164. 

 Zoological bibliography, vii, 80; ix, 163. 



Bibliotheca, Chun and Leuckart, iv, 

 412, 420; Taschenberg, v, 505. 



excursions in Fayal and San Miguel, 

 Guerne, vi, 77. 

 Zoologie, Verzeichniss der Schriften 



iiber, xl, 342. 

 Zoology — 



Annelids, Ehlers, v, 424. 

 Arthropoda, compound eyes of, Clarke, 



ix, 409. 

 Astrangia Dana?, vii, 503. 

 Biological Survey of San Francisco 



Mt., etc., C. H. Merriam and L. 



Stejneger, xl, 498. 

 Birds of Guadalupe Island, iv, 80. 

 Cicada, adaptation in, i, 316. 

 Chrysalides, gilded, iii, 321. 

 Fauna of Great Smoky Mts., Merriam, 



vi, 458. 

 Fish Entozoa, Linton, vii, 239. 

 Foraminifera, Recent and Fossil, Bibli- 

 ography of, Sherburne, vi, 295. 

 Forms of Animal Life, Rolleston, v, 



504. 



