A416 
Tubular cavities in the chalk, 122. 
Twilight bow, 389. 
Twining, Pr of. A.C. -, on Aurora borealis 
of Sept. 3, 1839, 376. 
Tyrian dye, 126. 
v. 
eee organography and physiology, 
sai 
Vege s, fossil, structure of, 126. 
Vine, pr 3 liable to lose its virtue, 
Vocabulary of Gissi or Kissi language, 
a. Mendi language, 45. 
be 3 . as Eines power, 
circle, theory of, 117. 
w. 
Ward, C. J., exchanges of shalte; 205. 
Water of Bri tish Channel analyzed, 12. 
ecomposition and recomposition| 
of, 336. 
INDEX. 
Waves, determination of their laws, 100. 
Wax tablet used in instructing the*blind, 
Webster, Prof. J. W., notice of his Man- 
of Chemistry, 329 
Weights, atomié, of elementary bodies, 
119. 
Whales, remains of, found at Durham, 
Eng., 130. 
heat, its growth accelerated, 129. 
Wilkes count of exploring ex- 
editio 0, 387, 
oody tsi, orion of, 128. 
Wool, new spec pot. introduced into 
Britain, 
Wyman, "Dr. Fe dissection of mackerel 
shark, 197 
electrical 
eel, 197. 
tract of proceedings 
of Boston Nat. tat Soc., 193, 391. 
Z. 
| Zeuglodon, geognostic position of, 381. 
Zoological researches in the Orkneys, 
128. 
