734 
Mossotti, Prof., on the action of the 
molecular forces in producing ca- 
pillary phenomena, 564; on a ca- 
pillary phenomenon observed by 
Dr. Young, 578. 
Munich, account of the magnetic ob- 
servatory and instruments at, 499 ; 
observations made at, 603. 
Navicula, on the locomotive organs of 
a large species of, 337. 
Nomenclature for the science of calo- 
rific radiations, 527. 
Peltier, M. A., on the cause of the 
electric phenomena of the atmo- 
sphere, and on the means of collect- 
ing their manifestations, 377. 
Phosphorescence, observations on, 
457; origin of the phenomena of, 
549. 
Phosphorogenic spectrum, 
tions on the, 549. 
Photographic papers, on the prepara- 
tion of some, 541. 
Plants, on the act of impregnation and 
on polyembryony in, 1; on the 
azotized nutritive principles of, 244. 
Poisson, M., on capillary action, 575. 
Polygastrica, descriptions of ten new 
genera of, 355. 
Polythalamia, descriptions of two new 
genera of, 357. 
Protochloride of phosphorus-ammo- 
nia and of arsenic-ammonia, consti- 
tution of the, 34. 
Protochloride of cacodyl, 300. 
Provostaye, M. F. de la, on the ac- 
tion of sulphurous acid on hypo- 
nitric acid, and on the theory of the 
formation of sulphuric acid, 65. 
Quetelet, M., on the analytical engine 
invented by C. Babbage, 667. 
Radiations, calorific, nomenclature for 
the science of, 527. 
Redfield, Mr., on the law of storms, 
205, 
Redtenbacher, Prof., on the compo- 
sition of stearic acid and the pro- 
ducts of its distillation, 48. 
observa- 
INDEX. 
Reid, Lieut.-Colonel, on the law 
storms, 207. 
Repulsive and attractive forces, on 
some general propositions relating 
to, 153. 
Retina, action of light on the, 423, 
432, 557. 
Rose, Prof. H., on the combinations 
of the volatile chlorides with am- 
monia, 52, 
Sand hills, on the formation of, 123. 
Schleiden, Dr. J., on the sexes and — 
generation of plants, 1. 
Seed, on the formation of, without 
previous impregnation, 19. 
Sefstrém, N. G., on the furrows which 
traverse the Scandinavian moun- 
tains, and probable cause of their 
origin, 81. 
Seleniet of cacodyl, preparation and — 
composition of the, 294. 
Solar spectrum, on the constitution of 
the, 537, 558. 
Spach and de Mirbel, MM., on the 
formation of the embryo in the 
grasses, 12. 
Stearic acid, on the composition of, 
48. 
Storms, on the Jaw of, 197. 
Sulphate of the chloride of sulphur and 
ammonia, constitution of the, 38. 
Sulphuret of cacodyl, 291. 
Sulphuric acid, theory of the formation 
of, 79. 
Sulphurous acid, action of, on hypo- 
nitric acid, 65. 
Telescope, on the method of deter- 
mining the power of a, 495. 
Temperature, on the non-periodic 
variations in the distribution of, 
221; influence of, on magnetized 
steel bars, observations on the, 515, 
Vapours, on the presence of, in the 
atmosphere, 395 ; influence exerted 
by the precipitation of, 456, 467. 
Vision, observations on, 422. 
Young, Dr., on the cohesion of fluids, 
564, 578. 
END OF VOL. Ili. 
PRINTED BY RICHARD AND JOHN E. TAYLOR, 
RED LION CGURT, FLEET STREET. 
