16 



EVERYDAY SCIENCE 



References are to pages 



Moon, earth's Continued 



eclipses 16-17, 19 



heat of 16 



light from ... 16, 347, 349, 351 



orbit of 15 



phases of 16,19,349 



revolution of .... 15-16, 19 



rotation of 15 



size of 2 



surface of 14-15 



tides influenced by . . 17, 19, 165 



weight of 15 



without atmosphere or water 210 

 Moons (satellites) .... 11-19 



Moraines 290, 297 



ground 297 



lateral 29C 



medial 290 



terminal 290,298 



Morse, Samuel F. B. . . . 492, 494 



Mosquitoes .... 403,452-454 



Mountains . . .22,238-241,248, 



264-267, 541-543 



age of, old and young . . 266-267 

 effects of, upon climate . 238-241 

 effects of, upon history . 541-543 



hills 264-265 



mining the chief industry 



of 542-543 



peaks of 266-267 



products of recent earth- 

 changes 248 



ranges of 267 



structure of 265-266 



volcanoes .... 503-511,521 



Mouth 408, 420, 423 



esophagus (throat) .... 408 



epiglottis 408 



saliva 420,433 



teeth 420 



Moving pictures 416 



Mulches 328 



Muscles 407 



Mushrooms 398-399 



spores 399 



Neap tide 165 



Neptune (a planet) . 5,11-13,49 

 day on 12 



Neptune (a planet) Continued 

 discovered by laws of gravita- 

 tion and inertia .... 49 

 distance from earth and sun 5, 11 



moons of 13 



orbit of 12-13 



Nerves (transmitters of im- 

 pulses and sensations) . . 413-423 



of hearing 416-418 



of sight 414-416 



of smell 413 



of taste 413 



of touch 413-414 



Nervous system 407, 413-418, 423 

 brain as seat of . . 407, 418, 423 



nerves 413-418 



spinal cord ...... 407 



Neutralization (of acids and 

 bases) 55-59,315 



Newton, Sir Isaac .... 43-44, 



47-49, 58, 361 



Newton's First Law . . 43-44 



on gravitation 47 



on light 361 



Niagara Falls and River . . 177, 526 



Nitrogen (a gas) . . 52, 97-100, 

 133,311-314,345,425 



an element 52 



compounded for use ... 99 

 constituent of air ... 97-100 

 necessary for life . . .313-314 

 constituent of food . . 425, 456 

 necessary for soil .... 310-314 



North Star (Polaris) ' . 9-10, 24 



" Northern Lights " (Aurora 

 Borealis) 360 



Nose (organ of smell) . . 413, 423 



Obsidian (igneous rock) . . . 253 



Ocean . . 17, 19, 152-169, 213, 249- 



251, 256-258, 514, 531-535, 552 



composition of water of . 152-154 



currents in ... 161-164, 169 



effects of . . . 162-164,213 



motion of 162 



rotating surface of . . . 162 



sargasso seas 162 



density of 154, 168 



depth of 154, 168 



