1052 



INDEX* 



Spinal marrow, brought into an electro- 

 genic state by voltaic currents, 674. 



Springs, wells, rivers of India and Egypt, 

 and of the sea and table lands within 

 the tropics, temperature of, 502. 



Stanley (E., Bishop of Norwich), obituary 

 notice of, 880. 



Stars, southern, annual proper motion of ; 

 observations on, to determine the direc- 

 tion of the sun's motion, 671. 



Static effects, production of, in voltaic 

 battery, 501. 



Steam, experiments to ascertain its effect 

 on the compass of an iron vessel, 727. 



■* vessels, incrustation of boilers of, 



consists principally of sulphate of lime, 

 830 ; carbonate most abundant in those 

 plying along coasts or in shallow seas ; 

 means of prevention, 831. 



— -— , temperature of and corresponding 

 pressure, 941, 960. 



Steel bars, deterioration of their magnetic 

 powers, 562, 



Stenhouse (J.), examination of the proxi- 

 mate principles of the Hchens, 735. 



, examination of the proximate prin- 

 ciples of some of the lichens. Part II., 

 811. 



, on the nitrogenous principles of 



vegetables as the sources of artificial 

 alkaloids, 840. 



— , on the oils produced by the action 

 of sulphuric acid upon various classes 

 of vegetables, 939. 



Stevenson (W. F.) on the supposed pro- 

 perties of the electric and magnetic 

 fluids, 511. 



, on the theory of vision, 565. 



, on the electric fluid, 625. 



, on phlogiston and the decomposi- 

 tion of water, 629. 



» , on the peculiar cooling effects of 



hydrogen and its compounds in cases 

 of voltaic ignition, 789. 



Stokes (G. G.) on the theory of certain 

 bands seen in the spectrum, supplement, 

 794. 



St. Helena, lunar atmospheric tide at, 

 663. 



Stomach, its movements in different 

 states ; diverse movement of the food 

 and of the muscles, 785 ; two currents 

 in the liquefied food; vomiting occa- 

 sioned by obstructed bowel, 787. 



Streams, new instances of absorbing 

 power of, 510. 



Sturgeon (W.) on a peculiar source of 

 deterioration of the magnetic powers 

 of steel bars, 562. 



account of some experiments on 



the electro-culture of farm crops, 600. 



Sulphur, voltaic action of, 557. 



, excreted by the kidneys, 626. 



, influence of, and of sulphuric acid 



and the sulphates on the urine, 796. 



Sun's motion, direction and determina- 

 tion of ; towards a point whose coordi- 

 nates are ascertained, 670. 



Sussex (H.R.H. Duke of), obituary no- 

 tice of, 484. 



Sykes (Lieut.-Col.), discussion of me- 

 teorological observations in India, 

 933. 



Sympiesometer, ranges of, on board the 

 Alfred in the river Plate, 509. 



Tadpole, influence of physical agents on 

 the development of ; affected by food 

 and temperature, not by absence of 

 light, 949. 



Taste, structure of the organ of, in ver- 

 tebrate animals, 751. 



, organ of, in man, minute examina- 

 tion of, 803 ; epitheUum, fungiform and 

 conical papillae, structure of; follicles 

 of the inferior surface, 804. 



Teeth, molar, of wart-hogs, development 

 and homologies of, 916. 



, system of notation for, in the class 



mammalia, 917. 



Telegraph, electric, experiments v>'ith, on 

 terrestrial currents, 683. 



, magnetic, difference of longitude 



determined by; clocks compared by; 

 signahng of star-transits by, from New 

 York to Cambridge, 788. 



Teleosauri, true position of the carotid 

 foramina and posterior nostrils in, 

 927. 



Telescope, Lord Rosse's, construction 

 and power of, 963; dimensions and 

 weight of the specula ; cases of flexure 

 in the metal ; system of levers and of 

 brass baUs for the bed or support, 

 964. 



Temperatm-e, Boussingault's mode of 



ascertaining, 503. 

 , changes of, produced by rarefaction 



and condensation of air, 517. 

 of man, fluctuations of, 564 ; in the 



tropics, 946. 

 Tendons, anatomy and physiology of the 



sheaths of, 621. 

 Tendrils, experiments on their curhng, 



684. 



Terrestrial magnetism, contributions to, 

 No. VI., 507 ; No. VII., 622. 



Thermograph, 663. 



Thermometer, description of, 550. 



, barometric, for the determination 



of relative heights, 597. 



, extraordinary height of, 625. 



