388 



INDEX. 



Tucker, Prof,, on association of ideas, 

 379. 



Walker, S. C, comet of Feb., 1843, 20— 

 comet in Orion, 58 — Hiern's comet, 

 160— Encke's, 202— Biela's, 235-ele- 

 ments of planet Neptune, 332 — iden- 

 tity of Lalande star and Neptune, 

 339 — new elements of planet Nep- 

 tune, 378. 



Water, decomposing power of, at high 

 temperatures, 353. 



Watson, John F., liberty to copy cer- 

 tain letters, 308. 



Weight, French standard, 155 — stan- 

 dard. Prof Bache, 159. 



Whipple, S. H., majtodon bones, 35. 



Wyandots, phonology of, 269. 



