INDEX. 433 



Las Vegas, road from 275 



Laval's Observations on Barometer 204 



Law of Decrease of Magnetical Intensity 90 



Law of Decrease of Temperature for Increase in Height 185 



Law of Density and Elasticity of Gases 184 



Layard 120 



Layard's Researches 113 



Leaf of Talipot Palm from Ceylon 39, 42 



Lear, O. H. P 38,44 



Lebias ovinus 345 



Le Conte, Dr. J. L 42, 44 



Lecture Room, description of 27,70 



Lectures 98, 137, 147, ] 56, 181 



Lectures, during 1853-4 28 



Lee, Lieutenant S P 91,95 



Leiostomus obliquus (Lafayette Fish) 329 



Leipsic 3G 



Lemon weir River 88 



Leptophie ostivus 44 



Lepus artemisia - 45 



Leroux's Route 275 



Letter from Secretary of War on Pacific Railroad 95 



Letter of the Secretary to the Speaker of the House 3 



Leucosomus americanus ( Dace, Wind-fish, Shiner) 341 



Leuciscus pygmeeus 342 



Level of Absorption and Condensation 226 



Leveret and Cromwell, Interview between 171 



Leveret's Despatch to Governor Endicott 172 



Leverrier, M ; 143, 145 



Lewis's Fork 81 



Lexington, Mo 88 



Lexington, Storeship 91 



Liatris, species of, used for Serpent Poison 133 



Liberia 92 



Liberty County, Ga 44 



Library, Amount expended on 22 



Library, Difficulty in 21 



Library of Congress, Catalogue of 23 



Library, Statistics of 21,24 



Library, Value of Books in 9 



Libraries in the United States, Account of New Edition of 23 



Libraries, Circular sent to 398 



Lichia Carolina 335 



Lichia piuosas (Spinous Dory) 336 



Liebig's Explanation of the Action of Poisons 129 



Ligatures, Beneficial in cases of Serpent Bite 132 



Light house Buard 35 



Lightning at San Francisco 258 



Mis. Doc. 24 28 



