ANALYTICAL INDEX. 



44 ; how they are to be discovered, 692, note ; of nature the 

 foundation of all other laws, 726. 



LEAD, its influence on the animal economy, 973. 



LEANDER, how he lost his life, 851, note. 



LEBLANC, M. on the ratio of carbonic acid in the air of different 

 places, 875. 



LE CANU, M. his analyses of blood, 631 to 635. 



LESLIE, on the radiating powers of different bodies, 193, 195 ; on 

 animal heat, 214 ; denounces Coulomb's theory of two electric 

 fluids, 439. 



LIEBIG, Dr. Justus, on the vital principle, 624 ; on the decompo- 

 sition of dead organic matter, 636 ; on the nourishment of 

 plants, 873 ; on the decomposition of water by plants, 874, 

 875, note ; on the daily rations of German soldiers, 896 ; on 

 the amount of animal heat daily evolved by the respiration of 

 man, 898 ; refutes the theory of Dulong and Despretz, 898, 

 note; his imperfect theory of respiration, 899, 900, 901 ; his 

 erroneous views of waste, and of fever, 902, 904 ; of the circula- 

 tion, and of pulmonary diseases, 905, note; his contradictory views 

 in regard to the cause of animal motion, 907 to 909 ; represents 

 heat, light, electricity, and magnetism, as immaterial agents, 

 910 ; his unsatisfactory theory of chemical action, 910, note ; 

 denies that nitrogen is absorbed during respiration, 911 ; his 

 classification of aliments, 912 ; asserts that non nitrogenized 

 food is not convertible into blood and nourishment, 912, 

 924 ; on the modus operandi of alcohol and the neutral salts, 

 980. 



LIFE, revolutions of organic, 30, 411, 412; the problem of 

 problems, 457 ; animal, the cause of, obtained from the at- 

 mosphere, 484, 458, et multis aliis locis ; phenomena of 

 regarded as wholly different from those of dead matter, 507, 

 509 ; subject to the logic of quantity, 556, 560 ; an important 

 law of, 605; how suddenly extinguished, 613 ; conditions es- 

 sential to, 663, 673 ; the result of combustion, 672 ; dynamical 

 effects of, 675 ; affinities of, superior to those of dead matter, 

 678, 679 ; aggregate forces of, in proportion to the amount of 

 respiration, 711 ; etymology of the word, 736; the principle 

 of, a universal remedy when fully understood, 860, 1076. 



LIGHT, on the cause of refraction, reflexion, and inflexion of, 

 86 ; refractive power of, a measure of the relative quantities of 

 caloric in different bodies, 87 to 92 ; how modified in passing 

 through crystals and other transparent media, 95, note ; iden- 

 tical with the ultimate atoms of ponderable matter, 99 ; gene- 

 rated by the volatilization of ponderable matter, 99 ; colours 

 of, depend on the species of ponderable matter employed, 99; 

 cannot be generated without ponderable matter, 100; caloric the 



