INDEX. 



353 



Iron, permeability of 220 



" plate, enormous 41 



" plates, resistance of to shot . . KS 



" protection of from oxydution . 49 



" targets, percussion of shot on . 100 



Iron-clad, latest British <J4 



" " vessels, different contrast- 

 ed 91 



" " vessels in action NS 



Iron-forts 102 



Iron girders, strength of 44 



" Ironsides " frigate, American . . 94 



Ivory, artilicial 70 



Japan, agriculture of Gl 



J upiter, supposed 5th satellite of . . 322 



Lake habitations, ancient . . . 



Language, universal 



Languages, mastery of 



" study of 



Larynx of the white man and 



the 



Laurentian rocks, fossils in .... 

 Lead, protection of water pipes from, 



Lea's cleaning solution 



Lithium, use and distribution of . . 

 Light, artilicial, conditions of ... 



effects of the atmosphere on, 

 " measurement of the chemical 

 action of 



polarized, new use of .... 

 Lights, colored, applied to sculpture, 



" intensity of various 



Liquids, cohesion, figures of. . . . 



Liquids, size of a drop of 



Lithograph, large 



Locomotion, our future 



Longevity and open-air exercise . . 

 Loom, improved 



290 



81 



194 



7 



330 

 304 

 245 

 145 

 210 

 175 

 208 



235 



209 



172 



178 



240 



121 



78 



38 



328 



70 



23 



Machinery, vs. man-power .... 

 Magnesium, observations on the 



metal - 217 



Magnet, electro, great 131 



new form of 202 



Magnetic action, illustrations of . . 124 



' disturbances, curious . . . 129 



" needle, new form of . . . 130 



" storms, analysis of. ... 129 



Magnetism, new researches into the 



laws of 128 



' of iron and steel turnings, 201 



" residual 130 



Magnitudes, minute 18 



Man, early migrations of 342 



" fixity of the types of .... 343 

 " new facts concerning the anti- 

 quity of 283 



Manna in the desert 313 



Manures, industry of 59 



Marriages, effects of consanguineous, 328 



Masts, iron 43 



Matter, construction of 112 



" transitions of 113 



Measure, French and English stand- 

 ards of 17 



Meats, preservation of . . . .52, 54, 55 



Mechanics, animal 12 



Men, hairy, of Yesso 321 



Metals, coating of 51 



new 215 



optical properties of .... Hid 



preservation of 48 



Metamorphism of rocks 2T4 



Metamorphosis, the universal ... 112 



Meteoric rain 311 



Meteorites, meteorological structure, :;<,; 

 Micrographical machine ...... it) 



Microscopes, improvements in . . . 170 

 Microscopic structure of iron and 



steel 171 



Minerals, coloring matter in .... 247 

 " variation in density by 



heat 101 



Mist, formation of 223 



Moa of New Zealand 3<>7 



Monitors, iron-clads in service ... 92 

 Moon and the earth, effects of colli- 

 sion of 105 



does it revolve ? 190 



" new views respecting 221 



proof of no atmosphere in . . 207 

 spectrum analysis of the light 



of 202 



" temperature and climate of . . 338 

 Mortality and ignorance, relation 



between 320 



Mountains, highest in the United 



States 300 



Mural decorations 75 



Music, as a physical and moral agent, 195 

 Musk-ox, fossil 311 



C< 



U 



97 



Naval ordnance, report of Bureau of, 

 Nebular hypothesis ........ 3'53 



Nebulae, discoveries in respect to . . 257 

 " new ............ 333 



" planetary ......... 258 



Nebulous matter, invisibility of . . 107 

 Nerve structure, researches on . . . 329 

 Nitrogen-protoxyd, liquefaction of. 244 

 Novelties, industrial ........ 75 



Oil, cotton seed .......... 243 



Oils, essential, preparations of . . . 244 

 Opacity and transparency ..... 178 



Ordinance, Ames's wrought iron . . 109 

 " heavy, endurance of. . 104 



" monster ...... 100, 107 



Orion, a. constitution of ...... 254 



" nebulae in ......... 201 



Organic bodies, discrimination of by 

 optical properties ....... 105 



Osteological collections ...... 328 



Oxygen, cheap production of . . . . 222 



" inhalation of ....... 227 



Oysters, artiticial cultivation of . . . 73 

 Ozone and the atmosphere ..... 223 



" influence of, on vegetation . . 223 

 " new source of ...... . . 225 



" tests for ........... 224 



Pearl oysters, mortality among . . . 320 



Petrifaction, artilicial ....... 230 



Petroleum, facts about ....... 293 



" impervious barrels for . 77 



" rocks in which found . . 290 



" volatile constituents of . 244 



Phantom images .......... 1 10 



