INDEX. 



519 



Spencer, J. "W., duration of Niagara 

 Falls. 455. 



Spiders, development of the lungs, 

 Simmons, 119. 



Spirals with compensated self induc- 

 tion, Tesla, 509. 



Spurr, J. E., stratigraphic position of 

 the Thomson slates, 159. 



Status of high temperature research, 

 Barus, 332. 



St. John, C. E ., wave lengths of elec- 

 tricity on iron wires, 311. 



Storer, P. H., elementary manual of 

 chemistry, 425. 



Telephonic measurement of electromo- 

 tive force, Barus, 346. 



Thomson, Sir W., popular lectures and 

 addresses, vol. ii, 433. 



Thurston, L. A., recent eruption of 

 Kilauea, 338. 



Todd, M. L., total eclipses of the sun, 

 76. 



Trowbridge, J., electrical waves on iron 

 wires, 307 ; physical abstracts, 69, 

 427, 508. 



u 



United States Geol. Survey, 70. 



Variations and mutations, Scott, 355. 

 Vegetable resources of India, 511. 

 Viviparidae. distribution of North Ameri- 

 can, Call, 132. 



w 



Wadsworth, F. L., interrupter for large 



induction coils, 497. 

 "Wadsworth, M. E., design for large 



spectroscope slits, 19. 

 Walden, P T.. double chlorides and 



bromides of caesium, rubidium, potas- 

 sium and ammonium, 283. 

 Washington, H. S., copper crystals in 



" aventurine glass," 411. 

 Water, determination, Penfield, 30. 

 Watts', George, vegetable resources of 



India, 511. 

 Wells, H. L., leadhillite, Missouri, 219. 

 Williams, H. S , age of manganese beds 



of Arkansas, 325. 

 "Woodward, H. B., Ramsay's physical 



geology and geography of Great 



Britain, 430. 

 "Wood worth. J. B., Carboniferous fossils, 



Norfolk Co., basin, 145. 

 Woollcombe, W. G., general physics, 



429. 



Zinc oxide, artificial crystals, Ries, 256. 



