Prismatic spectrum, mathematical in- vestigation of the phenomena of dark bands crossing the, 211.
Prony (M. de), biographical notice of the late, 178.
Prussia (King of), His Majesty's visit to the Royal Society, 370.
Pterodactylus, remains of, discovered in Tilgate Forrest, 290.
Pulley, modulus of the, 320.
Pus-globules, derived from corpuscles of the blood, 324.
Quetelet (Prof.) on the variation of the magnetic declination and horizontal intensity at Brussels, 329.
Rabbit, ova found in the Fallopian tube and uterus of the, 222.
Rain, average annual depth of, in London, 300.
, depth of, in 1839, 203.
Rain-guage,a few remarkson the, 297.
, the Royal Society's, on the po- sition of, 3.
Rainey (G.) on the cause of the ascent and continued motion of the sap, 432.
on the descending fluids of
plants, 449.
Rays of the solar spectrum, the che- mical action of the, on preparations of silver, &c., 205 ; combined che- mical action of rays of different de- grees of refrangibility, 208 ; the whitening power of several under the influence of hydriodic salts, 208; analysis of the chemical by absor- bent media, 209.
Reade (Rev. J. B.) on a new theory of earthy bases of vegetable tissues, 52.
on the construction and use of
single achromatic eye-pieces, 195.
Receipts and Expenditure of the Royal Society, in 1836-37, 29; in 1837- 38, 106 ; in 1838-39, 185 ; in 1839- 40, 272; in 1840-41, 355; in 1841-42, 423.
Red rays, chemical action traced much beyond the extreme, 208.
Redhouse (J. W.), results of meteoro- logical oljservations at Constantino- ple, 293.
Rees (Dr.G. 0,.) on the chemical ana- lysis of the contents of the thoracic duct, 373.
Refractions, astronomical, on the
theory of, 59, 60; Cassini's theory, 60; problem of, Newton's solutions, 59, 60 ; comparison of tables of, 63. Refractive indices, comparison of ob- served, with the results of theory, 47.
Regar soil of India, on the, 53. Resins, on the constitution of, 136,
162, 218, 241. Respiration, theory of, experiments on
the blood in connexion with, 78. of the leaves of plants, on the,
466.
Respiratory organs of animals and the preservation of independent tempe- ratures, the relation which exists between, 474.
system of nerves, on the, 218.
Rete mucosum, 165.
Retin-asphalt, resin of, 219.
Rickman (Mr.), notice of the late, 261.
Riddell (Lieut. E. J. B.), meteorologi- cal observations made at Toronto, 295.
Rigaud (Prof.), biographical notice of, 175.
Rigg (R.) on the influence of nitrogen on the growth of plants, 66, 148.
on the evolution of nitrogen du- ring the growth of plants, 70.
on the formation of alkaline and
earthy bodies with reference to their presence in plants, 131.
on the influence of nitrogen in
promoting vegetable decomposition, 148.
on the chemical constitution of
bodies Avhich undergo the vinous fermentation, 149, 165.
on the formation of alkaliiie
and earthy bodies by chemical ac- tion, 165.
, experiments showing that car- bon and nitrogen are compoinid bodies, 472.
Ritchie (Wm., LL.D.), notice of the late, 14.
Robertson (J.), geological specimens procured from Kerguelen's Land, 305.
, description of plants from Ker-
guelen's Land, 305.
, catalogue of birds collected on
board H.M.S. Tei'ror, between the Cape of Good Hope and Van Die- men's Land, 305.
