INDEX. 



211 



St. Louis, United States, once a 



fi-Vrr NWilllil> ... 115 



Iral, how long 



titty organs would take to heat 103 

 sions ... 47 



U. S. 

 'imissioners on ... 48 



Coin. Van.l.Tliilt'B Sta- 



t. n Island Steamer's 84 

 " caused by combuHtion 

 lut ween oxygen and 

 hydrogen ... 51 



" prevention of ... fil 



Stomach, like a magnetic bat- 



... 189 



Storms, how the inferior animal 

 knows of the approach 

 of ... 35 



cause of ... 127 



Sir John Herschcll on 128 

 Prof. Rogers on ... 128 

 the magnetic curves of 



the earth, the cause of 128 

 Maury on circular ... 130 

 Description of a circular 131 

 snow storm in Chicago 132 

 wind, blow to a centre, 



not round one ... 131 

 " raise the tide ... 161 



Sun, the, Professors Thomson 



and Tait on ... 70 

 " Sir John Herschell on 



the waste heat of ... 71 

 new theory of ... 71 

 inhabited ... 74 



not a furnace ... 76 



winds caused by ... 128 

 forms glaciers ... 109 

 repelling power of, on 



comets 174, 175 



influence of, on the 



tides ... 162 



Mairan on the extent 

 of the atmosphere 

 of ... 182 



Sunlight, how caused ... 73 



is electricity ... 73 



Swallows, instinct of ... 34 



T. 



Tables of food, Prof. Lyon Play- 

 fair's ... 134 



Tails of comets, length of ... 176 

 cause of ... 176 



Tait, Prof., on energy and the 

 sun . 69 



Tantramer River, Bay of Fundjr, 

 - rues two feet in thre 

 miles 



'.4 

 97 

 161 



Telegraph, arrangement of 



worked by grass 

 Tides, regularity of the 

 " in tlu- Mediterranean 

 " in the Bay of Fundy, and 



cause of 161, 1C5 



high, at new and full 



moon . 10f 



1 storms raise the ... 166 



" caused by pressure on the 



plane of the Ecliptic ... 164 

 cause of variation of the 164 

 " said to be caused by at- 

 traction ... 164 

 " Lardner's theory of, un- 

 tenable ... 164 

 " average rise of the ... 163 

 " follow the Muri.liun ... 163 

 " moon's influence on the, 



expliiiiii-'l ... 164 



Thomson, Sir William, on seed 

 bearing meteors ... 12 



on origin of life ... 12 

 on energy ... 69 



on how the sun's fur- 

 nace is fed ... 70 

 on electricity flowing 85 

 on the internal fire of 



the earth ... 15 



Thompson, Dr. Wyville, against 

 Dr. Carpenters theory of 

 oceanic circulation . . . 169 



Thomson, Dr. Thos. on electri- 

 city ... 85 

 Trees, attract only material 



similar to themselves 7 

 " result of coating, with 



paint ... 1C 



11 why they do not grow 



in winter ... 18 



" composed of carbon ... 140 

 " formed of an aggregate 



of individuals ... 149 



Tyndall, Prof, on Matter and 



Force at Dundee ... 2 

 " on dust and disease ... 25 

 " on heat as a mode of 



motion ... 48 



" on Sir Humphrey 

 Davy's ice experi- 

 ment ... f>4 

 lectures on heat ... 54 

 " on the heat caused by 

 the stoppage of the 

 earth ... 61 



