422 SCIENCE FROM AN EASY CHAIR 



Schonbein, experiments of, with re- 

 gard to ozone, 251, 252 

 Schwann, Professor, "cell theory" 



of, explained, 174-176 

 Science, discoveries in, satisfaction 

 experienced by those mak- 

 ing, I 

 sensibility to art compatible with 



capacity for, 44 



state officials' opposition to, 286 

 value and importance of, 7, 8 

 Scorpions, poison of, experiments 



with regard to, 108-1 10 

 Sea-anemones, poison-bearing threads 



of jelly-fishes and, no 

 Serpents, winged, probable connec- 

 tion between locusts and, 

 124-125 

 worship and propitiation of, 122- 



123 

 Shell-fish, poison-glands of, 1 1 1 



boring in stone, 347, 348 

 Siebe, Gorman and Co., perfected 

 diving dress constructed by, 

 265 

 "Silver-fish" book-worm. See 



Insects 



Skulls, ancient and modern, com- 

 parison between, 410 

 comparison between, of various 



periods, 393-401 

 Correze, comparison between 



Neanderthal and, 403-406 

 discovery of, 371, 374, 390, 402 

 restoration of, 410-411 

 European, compared with Neander- 

 thal and Correze, 406 

 Sleep, alternation of night and day in 

 its bearing upon periodic, 

 157-158, 159, 167, 168 

 animals' winter, 165, 166 

 artists' varied portrayal of, 156, 157 

 definition of term, varied, 157-161 

 irregularities and abnormal mani- 

 festations of, 164-166 

 length and duration of, conditions 



affecting, 166-167 

 man's, compared with repose or 

 quiescence of other living 

 things, 159-161 

 salient feature connected with, 161- 



164 



Shakespeare on, 155, 156 (quota- 

 tions) 



Snails, whelks and propagation ot, 



137, 138 



protection of young, 137, 138 

 Snakes, dragons and, connection 



between, 120-123 

 winged serpents, and probable 



origin of, 121125 



Solar system, comparative distance 

 from "fixed stars," 221-222 

 Sound, rate at which it travels, 221 

 Sparrows 



hedge and house, distinction 



between, 267 



differences between, 266-268 

 cuckoo eggs laid in nests of, 266, 



267 



use to agriculturists, 267 

 house and tree, close connection 



between, 268 

 harm done by, 267, 268 

 hidden or latent capacity in, 268 

 probable effects of destroying, 268 

 various species related to, 268 

 Spectator, The, case of poisoning by 

 Rhus toxicodendron recorded 

 in, 96 



Spiders, garden, use made by astro- 

 nomers of thread of, 262, 263 

 gossamer threads of minute 



autumn, 287-289 

 spinnerets of, 289-291 

 threads produced by, various uses 



made of, 289-292 

 various species of, 289 

 Spurges (Euphorbiacea), various 



species of, 301 



Star-fishes, propagation of, 329-330 

 Stars, early superstitions with regard 



to, 227, 228 

 fixed, comparative distance of solar 



system from, 221 

 estimated number of, 222 

 measurement of, 225 

 " photographic," estimated distance 



of, 223 



shape of, 231, 233 

 "Vega," position of, 224, 225 

 Stegomyia Gnat, 2, 3 

 Stings, poisonous, American plants 



possessing, 104 



comparison between plants and 

 animals possessing, 97, 106 

 nettles and other plants provided 

 with, 103, 104 



