416 



INDEX. 



Torpedo occidentalis, 89. 



Transfusion, 24. 



T ^ADWELL, Daniel. On the Ericsson engine, 32. On the measure 



of force, 91. 

 Tree, on a large Californian Coniferous, 94. 

 Trichomanes, 34. 



Troy, two dates for the fall of, 382. 

 Turtles, considered as corresponding in their embryonic development 



with the different stages of geological succession, 353. 



Vertical beams of light, 81. 

 Volcanic ashes, the nature of, 338. 



W. 



Walker, Sears C, decease of, 40. 



Wax, a new species of, 190. 



Webster, Daniel, decease of, 23. 



Wellingtonia gigantea, 130. 



Wheat-starch, 119. 



Wyman, Jeffries. On fossil bones of birds, 9. Mastodon, internal 

 structure, 25. The effects of physical agents on the development 

 of life, 35. On tadpoles, 60. On the jaw of the mastodon, 68, 

 Torpedo occidentalis, 89. Cause of contractility in some vegetable 

 tissues, 167. 



Wyman, Morrill. On fusel-oil compounds, 11. 



Zoology, classification in, 221. 

 Zugonectes, 43. 



END OF VOLUME III. 



