432 



tions in the method of differences, 

 ii. 70. 



Knight (T. A.) on the ascent of the 

 sap in trees, i. 53 ; on the descent 

 of the sap in trees, i. 118, 201; 

 upon the different qualities of the 

 alburnum of spring- and winter-felled 

 oak trees, ii. 127; on the motion of 

 the sap in trees, i. 147 ; on the state 

 in which the true sap of trees is de- 

 posited during winter, i. 172 ; on 

 the reproduction of buds, i. 200 ; on 

 the direction of the radicle and ger- 

 men during the vegetation of seeds, 

 i. 218 ; on the inverted action of the 

 alburnous vessels of trees, i. 236 ; 

 on the formation of the bark of trees, 

 i. 258 ; on the economy of bees, i. 

 268, ii. 346 ; on the inconverti- 

 bility of bark into alburnum, i. 290 ; 

 on the alburnum of trees, i. 311 ; 

 on the origin and formation of roots, 

 i. 328 ; on the influence of male 

 and female parents on their offspring, 

 i. 343 ; on the parts of trees pri- 

 marily impaired by age, i. 368 ; on 

 the causes which influence the direc- 

 tion of the growth of roots, i. 398 ; 

 on the motions of the tendrils of 

 plants, i. 434 ; on ice found in the 

 bottoms of rivers, ii. 46 ; on the 

 action of detached leaves of plants, 

 ii. 47; on the expansion and con- 

 traction of timber in different direc- 

 tions relative to the position of the 

 medulla, ii. 73 ; on the office of the 

 heart wood of trees, ii. 87. 



Knox (Rt. Hon. G.) on the Newry 

 pitchstone, and on the formation of 

 pumice, ii. 1 72 ; on bitumen in 

 stones, ii. 202. 



Knox (J.) on some phenomena of 

 colours, ii. 15. 



Kcinig (C.) on a fossil human skeleton 

 from Guadaloupe, i. 487. 



L. 



Lac, experiments and observations on, 



i. 148. 

 Lacerta Gecko of Java, on the feet of 



the, ii. 38, 52. 

 Lamb, monstrous, i. 41. 

 Lambton (Lt. Col.W.), results deduced 



from the measurement of an arc on 



the meridian, ii. 102; corrections 



applied to the great meridional arc, 

 to reduce it to the parliamentary 

 standard, ii. 182. 



Lamprey and myxine, on the organs of 

 respiration in, ii. 23 ; on the mode 

 of generation of, ii. 24, 188. 



Lane (T.) on the magnetic attraction 

 of oxides of iron, i. 204. 



Lantern : Dr. Clanny's, for coal 

 mines, i. 467 ; Sir H. Davy's, for 

 coal mines, ii. 31 ; safety-lamp, ii. 

 32, 35, 61. 



Laplace, Mr. Ivory on his method for 

 computing the attractions of sphe- 

 roids, i. 413. 



Lax (Rev. W.), method of examining 

 the divisions of astronomical instru- 

 ments, i. 335. 



Leach (Dr. W. E.) on the genus Ocy- 

 thoe, with a description of a new 

 species, ii. 75. 



Lead, native, arseniate of, i. 33 1 . 



Leaves, detached, of plants, on the ac- 

 tion of, ii. 47. 



Lee (S.) on the dispersive power of 

 the atmosphere, and its effects on 

 astronomical observations, ii. 28. 



Lee (Dr.) on the functions of the in- 

 testinal canal and liver of the human 

 foetus, ii. 361. 



Leech, on the respiration of the, ii. 24. 



Lens : fluid, of 7'8 inches aperture 

 employed in a telescope, ii. 356 ; 

 compound, on the aberrations of, 

 ii. 146. 



Levellings carried across the Isthmus 

 of Panama, account of, ii. 385. 



Lihavius, a new property of the liquor 

 of, i. 426. 



Life contingencies, an analysis and no- 

 tation applicable to the estimation of 

 the value of, ii. 132 ; on a new mode 

 of determining the value of, ii. 252; 

 formula for expressing the decre- 

 ment of human life, ii. 275. 



Light: spontaneously emitted, on, i. 

 11, 60 ; on the dispersion of, i. 91 ; 

 on some properties of, i. 453 ; new 

 properties of exhibited in the opti- 

 cal phenomena of mother-of-pearl, 

 i. 502 ; on the properties impressed 

 upon light by the action of glass, 

 i. 506 ; on the action of crystallized 

 surfaces upon, ii. Ill; maximum 

 of the abberration of, ii. 114; ex- 

 periments on solar and terrestrial, 



