ANALYTICAL INDEX. 



HOPKINS, Mr. experiments with in the hot bath, 847. 



HORSE, on the size of his chest, 574 ; his muscular power, 576, 

 675 ; not known in America before its discovery by Columbus, 

 745. 



HORSEFIELD, Dr. on the operation of the chettik of Java, 969. 



HOWARD, Luke, on the mean temperature of London and Totten- 

 ham Green, 811, note. 



HUMBOLDT, Baron, on the theory of volumes, 56 ; his account of 

 a tropical thunder-storm, 301 ; on the mean temperature of 

 different zones, 693 ; on the coldness of polar America and 

 Asia, 695 ; on the influence of tropical land on the temperature 

 of climates, 701 ; on the colour of the aboriginal Americans, 

 75 1 ; on the elevation limit of yellow fever in the West Indies, 

 804 ; on the temperature requisite for vegetation, 694. 



HUME, David, on the necessity of marching up directly to the 

 capital or centre of the sciences, 45, note ; his theory of causa- 

 tion, (which was a march in the opposite direction), 502. 



HUNTER, John, on the materia vitas, 496 ; regards animal heat as 

 a product of the vital principle, 497, 841 ; considers heat as 

 the principle which unlocks matter, 498 ; on the conversion of 

 arterial into venous blood, 552 ; was fettered by the schools, 

 592 ; on the capacity of the heart and aorta of a whale, 596 ; 

 his experiments on irritability, 616 ; demonstrates the vitality 

 of the blood, 654 ; his experiments of freezing animals, 835 ; 

 his experiments fallacious, 842, 843; his definition of trance, 

 962, note ; on the modus operandi of mercury, 977 ; on the 

 blackness of arterial blood in apoplexy, 1061. 



HURRICANES, theory of, 330 ; Capper on, 332. 



HYBERNATION, theory of by Dr. M. Hall, 828 ; experiments on, 

 833 ; owing to cold alone, 834 ; experiments of nature on, 

 836 ; some close questions, 836 ; experiments of Sir H. Davy 

 and Dr. Edwards, 837. 



HYDROGEN, its immense elastic force, 111 ; how diminished on 

 uniting chemically with chlorine, 113. 



HYDROPATHY, a brief account of its merits and demerits, 1069, 

 note. 



HYDROPHOBIA, whether a modification of tetanus, 1026 ; cruel 

 treatment of, 1026 ; a remarkable case of, related by Baron 

 Munchausen, 1027 ; whether, actually contagious, 1027 ; often 

 spontaneous, 1028; a case of, related by the author, 1029; 

 various exciting causes of, 1028, 1030 ; deplorable ignorance 

 concerning, 1Q30 ; treatment of, by M. Bouisson, 1031. 



INCUBATION, experiments on, 638, 639 ; artificial, in Egypt, 



641. 

 INDIA, population of, 697. 



