INDEX. 



347 



Holothuria heros, Agassiz, 269. 



HoRSFORD, Professor, On the chemical action of water on lead 

 and other pipes, 62, On the explosions of burning-fluids, 178, 

 311. On the spheroidal state of water, 180. On the spheroidal 

 state of bodies, 239. On the permeability of metals to mercury, 

 295, 



Hydraulics, new experiment in, 265. 



I. 



Ice, apparatus for making, 300. 

 Ice, columnar crystallization of, 221. 

 IcilidcB, fam., 219. 

 Icilius, gen. , 220. 



ovalis, D,, 220. 

 Indian Mining at Lake Superior, 195. 

 Inscription in Island of Mananas, 267. 

 Insects, circulation in, 162, 180. 

 Insects, development of ova in, 181. 

 Institution, Smithsonian, 260. 

 Iphimedia, gen., Rathke, 217. 

 nodosa^ D., 217. 

 simplex, D., 217. 

 Isle Roy ale, animals of, 184. 

 Isodendrion, gen.. Gray, 324. 



laurifolium, G., 324. 

 longifolium, G., 324. 

 pyrifolium, G., 324. 



J. 



Jackson, C. T. On tellurium in gold ore, 2. On manganese in the 

 water of streams, 6z;c., 111. On coast marks, 221. On apatite, 

 242, Temperature at which charcoal takes fire, 256. Analysis of 

 phosphate of lime, 261, On the explosion of burning-fluids, 316. 

 On the use of alcohol, 322. 



Jenks, William. On an inscription on a rock in the island of Mana- 

 nas, 267. 



Journal, Astronomical, 163, 



