INDEX I. 



235. 



55 ; treatment of, in Cambridge, 68 ; 

 treatment of, in Romford, 61. 



Sewers, experiments on the air in, 72; 

 microscopical examination of the air 

 in, 74. 



Ships, report on the existing knowledge 

 on the stability, propulsion, and sea- 

 going qualities of, 44. 



Shooting-stars, radiant-pointsof meteoric 

 showers obtained by Prof. Schiaparelli 

 from observations of, at Bergamo, 98. 



Siemens (C. W.) .on standards of elec- 

 trical resistance, 14 ; on a uniformity 

 of weights and measures, 232. 



Sissons (W.) on tidal observations, 120. 



Smith (W.) on a uniformity of weights 

 and measm-es, 232. 



Sodium and potassium alcohols, practi- 

 cal uses of, 1(32. 



Stability, propulsion, and sea-going qua- 

 lities of ships, report on the existing 

 knowledge on the, 44. 



Steam-boiler explosions, report of the 

 committee appointed to consider and 

 report on the various plans proposed 

 for legislating on the subject of, with 

 a view to their prevention, 1. 



Steam-power meter, Messrs. Ashton and 

 Storey on a new, 151. 



Stewart (Prof. Balfour) on standards of 

 electrical resistance, 14; on the rate 

 of increase of undergroimd tempera- 

 ture, 29. 



Stokes (Prof.) on the importance of com- 

 pleting, Avithout delay, the valuable in- 

 vestigation into the composition and 

 geological distribution of the htema- 

 tite iron-ores of Great Britain and Ire- 

 land, 9 ; on tidal observations, 120. 



Stonefalls, number of, from a.d. 1800 to 

 1870, 94, 96. 



Storey (Messrs.) and Ashton on a new 

 steam-power meter, 151. 



Sidphui- alcohol, mercaptan, on the phy- 

 siological action of, 163. 



Sykes (Colonel) on a imiformity of 

 weights and measures, 232. 



Sylvester (Prof.) on the rainfall of the 

 British Isles, 170. 



Symons (G-. J. ) on the rate of increase of 

 underground temperature, 29 ; on the 

 rainfall of the British Isles, 170. 



Thermometer designed by Sir William 

 Thomson for the underground tempe- 

 rature committee, 37. 



Thomson (James) on cutting and pre- 

 paring sections of movmtain-limestone 

 corals for photographing, 41, 



Thomson (Prof. Sir W.) on standards of 



electrical resistance, 14 ; on the rate 

 of increase of imdergTound tempera- 

 ture, 29 ; on earthquakes in Scotland, 

 48 ; on tidal observations, 120. 



Tidal observations, report of the com- 

 mittee on the extension, improvement, 

 and harmonic analysis of, 120. 



Tomlinson (C.) on the rainfall of the 

 British Isles, 170. 



Triethylic and trimethylic ethers, phy- 

 siological action of, l66. 



Tristram (the Eev. Dr.) on the practica- 

 I)ility of establishing " a close time " 

 for the protection of indigenous ani- 

 mals, 13. 



Underground temperatm-e, on the rate of 

 increase of, downwards in various lo- 

 calities of dry laud and under water, 29: 



Utilization of sewage, report of the 

 committee on the treatment and, 49. 



Yarley (C. F.) on standards of electrical 



resistance, 14. 

 Vivian (Edward) on the exploration of 



Kent's Cavern, Devonshire, 16. 



"Wales, monthly tables of the rainfall in 

 1868 and 1869, 190. 



Wanklyn_(Prof.) on the treatment and 

 ntilizatiou of sewage, 49. 



Water, analysis of, supplied to the town 

 of Bury for domestic use, 57. 



, on the rate of increase of imder-" 



ground temperature downwards in va- 

 rious localities of dry land and under. 

 29. ' 



Webster (Thomas) on steam-boiler ex- 

 plosions, 1 ; on tidal observations, 120. 



Weights and measures, report on the 

 best means of providing for a imifor- 

 mity of, with reference to the interests 

 of science, 232. 



Wheatstone (Prof. Sir Charles) on stan- 

 dards of electrical resistance, 14. 



Whitworth (Sir J., Bart.) on steam- 

 boiler explosions, 1 ; on a uniformity 

 of weights and measures, 232. 



AVilliamson (Prof.) on standards of elec- 

 trical resistance, 14 ; on the treatment 

 and utilization of sewage, 49 ; on the 

 treatment of the sewage of Bury, 57 ; 

 of Cambridge, 60 ; on a uniformity of 

 weights and measures, 232. 



Woodward (Henry) on cutting and pre- 

 paring sections of mountain-limestone 

 corals for photographing, 41. 



Yates (James) on a uniformity of 

 weights and measures, 232. 



