428 



emission of light and heat, i. 49, 55 ; 

 observations on Ceres and Pallas, i. 

 80 ; on the solar and terrestrial rays 

 that occasion heat, with a view of 

 the laws to which light and heat are 

 subject, i. 23, 30; M. Prevost's re- 

 marks on, i. 94 ; catalogue of 500 

 nebulae, nebulous stars, planetary 

 nebulae, and clusters of stars, i. 98 ; 

 observations of the transitof mercury 

 over the disc of the sun, i. 112 ; the 

 causes which prevent the proper ac- 

 tion of mirrors, i. 1 12 ; on the changes 

 in the relative situation of double 

 stars, i. 126, 158; experiments to 

 determine very small angles, and the 

 real from the spurious diameters of 

 celestial and terrestrial objects ; with 

 an investigation of the nature and 

 magnitude of the star (Juno) disco- 

 vered by Mr. Harding, i. 166; on 

 the direction of the motion of the sun 

 and solar system, i. 1 97 ; on the sin- 

 gular figure of the planet Saturn, i. 

 203 ; on the quantity and velocity of 

 the solar motion, i. 226; on the fi- 

 gure, the climate, and the atmosphere 

 of Saturn and its ring, i. 246 ; on 

 the cause of the coloured concentric 

 rings discovered by Sir Isaac Newton, 

 i. 264, 338, 365 ; observations on the 

 planet Vesta, i. 271 ; observations of 

 a comet, i. 272, 297 ; observations 

 relating to the construction of the 

 heavens, i. 406 ; observations of a 

 comet, with remarks on its construc- 

 tion, i. 418 ; observations of a second 

 comet, with remarks on its construc- 

 tion, i. 427 ; observations relating to 

 the sidereal part of the heavens, and 

 its connexion with the nebulous part, 

 i. 494 ; observations of the satellites 

 of the Georgian planet, ii. 25. 

 Herschel (Sir J. F. W.) on a remark- 

 able application of Cote's theorem, i. 

 442 : consideration of various points 

 of analysis, i. 506 ; on the develope- 

 ment of exponential functions, ii. 33 ; 

 experiments tending to investigate 

 the local arrangement of the celestial 

 bodies in space, and to determine the 

 extent and condition of the Milky 

 Way, ii. 76 ; on circulating func- 

 tions, ii. 89 ; on the relative distances 

 of clusters of stars, and how far the 

 power of telescopes may be expected 



to reach into space, ii. 100 ; on the 

 action of crystallized bodies on ho- 

 mogeneous light, and on the devia- 

 tion from Newton's scale in the tints 

 which many of them develope on ex- 

 posure to a polarized ray, ii. 122 ; on 

 the aberrations of compound lenses 

 and object-glasses, ii. 146; on the 

 separation of iron from other metals, 

 ii. 148 ; repetition of M. Arago's 

 experiments on the magnetism of 

 various substances during rotation, 

 ii. 249 ; observations made for the 

 purpose of determining the differ- 

 ence of meridians of the observato- 

 ries of Greenwich and Paris, ii. 261 ; 

 on the parallax of the fixed stars, ii. 

 274, 308 ; observations of the appa- 

 rent distances and positions of 380 

 double and triple stars, ii. 224. 

 Hey (Dr. R.) propositions containing 

 some properties of tangents to cir- 

 cles; of trapeziums inscribed in 

 circles: and on the elliptic repre- 

 sentations of circles, upon a plane 

 surface, by perspective, i. 502. 

 Hirudo vulgaris, on the, ii. 54. 

 Hirudo complanata and H. stagna- 

 lis, formed into a distinct genus, 

 ii. 78. 



Holland (Dr. H.) on the manufacture 

 of the sulphate of magnesia at Monte 

 della Guardia, ii. 48. 

 Home (E.) on the membrana tympani 

 of the ear, i. 1 , 1 1 ; on the head of the 

 Ornithorhynchus paradoxus, i. 29 ; 

 on the irritability of nerves, i. 33 ; 

 on the structure of the orifices situated 

 between the nostril and eye, and de- 

 scription of a bag connected with 

 the eye, of poisonous snakes, i. 138 ; 

 on the structure and growth of the 

 grinding teeth of the wild boar, i. 

 52 ; on the anatomy of the Orni- 

 thorhynchus paradoxus, i. 68 ; on 

 the anatomy of the Ornithorhynchus 

 Hystrix, i. 89 ; on the structure of 

 the tongue, i. 1 1 1 ; on the struc- 

 ture of the neck of the Cobra de ca- 

 pello, i. 157 ; account of a small 

 lobe of the human prostate gland, 

 not before noticed, i. 224 ; on the 

 shell of the sea-worm, i. 234 ; on 

 the camel's stomach, respecting the 

 water it contains, and some pe- 

 culiarities in the urine, i. 2 13 ; ac- 



