754 



INDEX. 



Metalliferous, layers, where found, 542 ; how 

 formed, 542 ; rocks, 542. 



Metamorphosis, 126 ; of bisects, the origin of 

 showers of blood, 130. 



Meteoric stones, 731. 



Micrometers, employed hi delicate investigations, 

 9 ; their minute divisions, 9. 



Microscope, The, its importance to the investigator 

 and by whom discovered, 7 ; achromatic, 8. 



Microscopic animalcules, 10 ; world, extremes in, 

 13 ; shells, cities built of, 32. 



Microscopists, their statements disbelieved, 7. 



Microzoa, 10 ; capable of sustaining extreme cold, 

 1G ; great journey made by, 23 ; in vascular sys- 

 tem of plants, 23 ; in blood globules, 23. 



Microzoon, its extreme minuteness, 13 ; profusion 

 of vital apparatus, 14 ; indestructible nature of 

 coverings of some, 14 ; its numerous stomachs, 15. 



Migrations of animals, 295 ; erratic, 290 ; annual mi- 

 gration, 290 ; commercial relations with distant 

 countries not so favorable to, as supposed, 299 ; 

 mammals, 300 ; not prone to leave their haunts, 

 300 ; hippopotami do not migrate, 300 ; kanga- 

 roos also attached to their native soil, 300*; bats 

 do not migrate, 301 ; engraving of Nycteris bat, 

 302 ; wonderful intelligence displayed by buffa- 

 loes in migration, 301 ; ingenuity displayed by 

 squirrels^ 301 ; Regnard on, 302, note ; lemmings, 

 extraordinary migration of, 303 ; engraving of 

 lemming, 303 ; of birds, 304 ; cranes, 305 ; en- 

 graving of, 300 ; migration of some birds under- 

 stood, 309 ; mysterious migration of swallows, 

 309 : suppositions as to disappearance in winter, 

 310, and note ; penguin haunts shores of Africa 

 yearly to breed, 315 ; of reptiles and fishes, 320. 



Miliola, constitutes coarse limestone, 33 ; minute- 

 ness of, 33 ; engraving of, 33. 



Milky Way, a stellar cloud, 091 ; a congeries of 

 stars, 696, 700 ; distance from the earth, 517. 



Mimosa, yields emollient gum, 701. 



Mimosa pudica, asleep and awake, engraving of, 

 430 ; sensibility of, 437. 



Miners, 182, 277 ; engraving of mole-cricket, 184. 



Mint, 411. 



Mirage in desert, 672 ; engraving of, 671. 



Mississippi, length of time it has run in its present 

 bed, 574. 



Mistletoe, how propagated, 527, and note. 



Moa, The, of New Zealand, 235 ; engraving of, 231. 



Modiohis lithophagus, stone-eating Modiolus, en- 

 graving of, 74 ; has cut channels in columns of 

 temple of Jupiter Serapis, 77 ; engraving of, 75. 



Mole, a protector of agriculture, 220 ; its food, 220 ; 

 Talpa Europcea, engraving of, 220 ; its voracious- 

 ness, 220, 221, and note ; catches birds, 222 ; never 

 gnaws roots, 222 ; an insect-eater, 222 ; errors 

 concerning, 222, note. 



Mole-Cricket, engraving of, 184 ; dreaded in Ger- 

 many, 185 ; its subterranean habits, 185. 



Molluscs, Microscopic, shells formed of carbonate 

 of lime, 83 ; number required to form a pound of 

 chalk, 83. 



Momotombo, volcano in Nicaragua, 623. 



Monads, minuteness of, 41 ; Oken, Leucippus, and 



Ehrenberg on, 41 ; great numbers in a drop of 

 water, 41 ; of Leibnitz, 42 ; engraving of, 41. 



Monk Bombyx (B. monacha), why called, 213 ; its 

 caterpillar destroys forests, 213 ; immense num- 

 ber, 213. 



Monsters, 733 ; aerial, found in Switzerland, 735 ; 

 dragon of Mount Pilatus, engraving of, 736 ; 

 belief in, cherished in Northern Europe, 737 ; 

 works of Olaus Magnus the source of many 

 modern tales of horror, 737 ; sea-serpent, after 

 Olaus Magnus, engraving of, 737 ; cetacea which 

 crushed ships, engraving of, 739 ; marine, en- 

 graving of, 740 ; bird-tree, engraving of, 741. 



Montaigne, Michel, on age of trees, 404. 



Moon, The, 714 ; nearness to the earth, 714 ; size 

 compared with the earth, engraving of, 713; 

 mountain chains, names and height of principal, 

 715 ; appearance when full, engraving of, 710 ; 

 volcanoes in, 715, seq. ; supposed seas in, 717 ; 

 craters on surface, engraving of, 717 ; part of 

 crescent, engraving of, 719 ; possesses neither 

 water nor vegetation, 718 ; inhabitants, 718 ; 

 coldness of climate in, 718 ; its minutest details 

 revealed by the telescope, 718. 



Mormolyce phyllodes, leaf-insect, engraving of, 88. 



Morton discovers Polar Sea, 650. 



Mosaic Deluge, conjecture respecting, 592. 



Mosasaurus, 561. 



Mosquitoes, engraving of, 92 ; enemies to man, 93 ; 

 mode adopted to escape them in Senegal and in 

 Lapland, 93, 94 ; plan adopted by Maupertuis' 

 companions, 94. 



Motacilla arundinacea, reed-warbler, its mode of 

 building, 273 ; nest of, engraving of, 271. 



Mound-Building Megapodius, 240 ; nest of, engrav- 

 ings of, 241, 243. 



Mountain-Meal, deposits of, where found, 32, note; 

 infusoria found in, engraving of, 31. 



Mountains, builders of, 79, 240 ; formed of shells, 

 79 ; how upheaved, 538 ; how developed, 538 ; 

 upheaval of, 594; Jorullo, engraving of, 595; 

 their shapes, 599 ; ascent of, effect on respira- 

 tion, 599. 



Muschenbroeck on transpiration of plants, experi- 

 ment by, engraving of, 393. 



Musset, M. Ch., discovery of manner of transpira- 

 tion of edible Arum, 397. 



Mygale avicnlrtria, engraving of, 102, and note ; M. 

 ccementaria, mason-spider, its habits, 190 ; and 

 dwelling, engraving of, 191. 



Myosotis diversicolor, mutability of its color, 453. 



Myrica cerifera, 413. 



Myristica moschata, engraving of, 421. 



N. 



Naiades, a family of spiders, 202 ; their habits, 

 202 ; a plant, 387 ; leaves unprovided with epi- 

 dermis, 387. 



Naval architecture, 270. 



Nebulae, 701 ; what they are, 702, and note ; their 

 shape, 702 ; spiral, engraving of, 703 ; number 

 known, 704 ; Dumb-Bell, engraving of, 704 ; cal- 



