12 



EVERYDAY SCIENCE 



References are to pages 



Irrigation Continued 



ditching 331 



flooding .... 330-331,346 



evaporation 331 



Islands . . . 256,261,540-541 



continental 256, 540 



oceanic 540 



tropical 540 



variations of life-forms on 540-541 



Isobars 214 



Isothermic maps .... 213-214 



Isotherms 213 



Isthmus (of land) 525 



Jupiter (a planet) . . . 11-13,353 



brilliancy of 12 



day on 12 



distance from earth and sun 11 



eclipses of moons of ... 353 



size of 13 



surface of ....... 11 



Kerosene (mineral oil) . . . 520 

 Kindling temperature . . 72-73, 94 

 methods of bringing sub- 

 stances to 73 



spontaneous combustion . . 73 

 variation of, in different sub- 

 stances 72 



Kinetic energy . . . .60, 93, 396 



Lagoons . 259-260 



Lakes .... 171-174,177-178, 

 185, 300-301 



as filters 172 



as reservoirs 172 



evaporation the cause of salt 



lakes 172-173 



fringing lakes 185 



glacial lakes 300-301 



outlets of 172-173 



Land . . . 160-162, 175-176, 181- 



190, 247-306, 308, 525, 535-552 



bars, sand . . . .162, 258, 282 



beaches 161,251 



capes 258 



cliffs 160 



composition of 252-255, 275, 308 

 continental shelf . . . 256-259 



Land Continued 



continents .... 248, 256-276 



divides 175-176 



drowned river valleys . . 188-189 

 dunes, sand . 258-259, 283-284 



hemispheres 537-538 



hills 264-265 



islands . . . 256,261,540-541 



isthmus ' 525 



life on ... 257-263, 535-552 



marshes 260 



mountains .... 22, 238-241, 



248, 264-267, 541-543 



plains . . 181-185, 257, 268-276, 



301-302, 544-548, 553 



reefs, sand 257-260 



spits 161-162 



structure of 255-256 



terraces 186 



Latent energy .... 60, 93, 396 



Latitude . 32 



Latitudes, horse 221 



Lava (volcanic eruption) . 277, 506 



Leaves (of plants) 379-386, 421-422 



arrangement on stem . . 379-380 



regulation of sunlight . . 380 



composition of .... 382-383 



function of .382 



shapes of 380-381 



sun's action upon .... 384 



veins of 381 



water in 385 



Lens (of eye) 414-416 



Lenses 355-356 



concave 355 



convex 356 



use of 355 



Levees 184, 338 



Lever 462-465 



law of 464 



law of machines 465 



principle of 464-465 



Life (common to animals and 

 plants) . . . 98-100, 135, 141, 

 151-152, 210, 257-263, 311-319, 

 345, 347, 366-458, 522-553 

 adaptability to physical con- 

 ditions .... 528-535,552 

 ancient history of ... 622-523 



