3 i2 INDEX. 



Stars, absorption of the heat radiated by the, by the earth's atmo- 

 sphere, i. 55 



chemical power of the light of the, i. 55 

 Stars, falling, i. 28 

 Stars, fixed, constitution and spectra of the, i. 154, 155, 162, 163 



spectra of periodic stars, i. 156 



Staurastrum, structure and development of various species of, i. 132 

 Steam-engine, equivalence between the mechanical work and heat of 



the, as between cause and effect, i. 29 

 causes of the motive force in the, i. 29 

 Steel, effect of magnetism on, i. 77 



importance of the spectrum analysis in the manufacture of, by 



Bessemer's process, i. 137, 138 



Stegobolus Berkelianus, structure and organs of development of, ii. 299 

 Stelleridse, structure and mode of reproduction of, ii. 169-172, 174 

 Stems of plants, structure of, i. 384, 405 

 Stenochlaena, stem of, i. 339 



Stephanosphsera pluvialis, structure and development of, i. 187-189 

 Stickleback, entozoon of the, ii. 145 

 Sticta, structure of the genus, i. 304 

 Sticta pulmonacea, structure and habitat of, i. 304 

 Stilbacei, structure and habitat of, i. 283 

 Stomach, human, fungus in the, i. 275 

 Stomapoda, characters of the, ii. 198 

 Stomata of plants, structure of the, i. 405, 406 

 Stone-lilies, structure of, ii. 174, 175 

 Strawberry, fructification of the, i. 381 

 Strombus gigas, or queen conch, shell of, ii. 234 

 Strontium, i. 3 



one of an isomeric triad with calcium and barium, i. 105 

 red-coloured light obtained by the combustion of, i. 133 

 spectrum analysis of, i. 133 

 spectrum analysis of the rarefied vapour of, i. 142 



effect of high temperature, i. 142, 143 

 Strychnos nux vomica, fruit of, food for birds, i. 426 

 Substitution, direct or indirect, the basis of the modern doctrine of equi- 

 valents, i. 104 



Succinic acid, chemical combination forming, i. 97 

 Sugar, production of, in plants, i. 421 

 Sugar-cane, size and structure of, i. 386 

 Sulphur, i. 16 



extensive range of affinities of, i. 16 



