INDEX. 



415 



eter, 220. Proofs of the protozoic age of some of the altered rocks 

 in Massachusetts, 315. 

 Rotation, on motions of, 206. 



S. 

 Sago, 117. 



Secretary, Recording, 25. 

 Setosse, 263. 

 Sicyos, subgen. Sicyocarya, 54. 



cucumerinus, 54. 



macrophyllus, 54. 



pachycarpus, 54. 

 Subgen. Sicyopsis, 54. 



montamis, 54. 

 Snow, shape of the masses of, 325. 



Solfa-taras, the action and changes in locaUty of the, 337. 

 Sound, on the velocity of, 26. 



Spider-lines for use in the micrometers of telescopes, 22. 

 SpircBantlienmm, 128. 



Samoense, 128. 

 Vitiense^ 128. 

 " Spiritual Manifestations," Arago's opinion of, 187. 

 Spongilla, 90. 



Springs, the flowing of, 167, 

 Statutes, amendments of, 1. 

 Stereoscope, 22. 

 Streptodesinia, 52. 



SuLLivANT, W. S. Notices of new Mosses obtained by the exploring 

 expedition under Captain Wilkes, 181. 



T. 



Tadpoles, 35, 60. 



Tangents of circles and spheres, 385. 



Tapioca, 114. 



Telegraph cable, 355. 



Terrestrial magnetism, discussion of observations for cui'ves of, 186. 



Teschemacher, J. E., decease of, 61. 



Tetraplasandra, 129. 



Tissues, cartilaginous and osseous, 17. 



