J8 INDEX 



Bacon (Lord), his system of ciphers, remarks on, xii. 24, 25. 



Bacon (Roger), notice of the alchymistical works of, ix. 227, 228 



Badnall (Mr.), improvement of, in dyeing with Prussian blue, 

 xvii. 167 



Bagne, lake and glacier of, account ot, xv. 390, 391 



Bagnold (Captain), account of a table furnace by, v. 131 



■ pocket blow-pipe, notice of, vii. 186 



account of a waterspout, ix. 414 



Baily (Mr.), his remarks 'on the nautical almanac refuted, xiii. 

 201-207 



Bain's (William), essay on the variations of the compass, iv. 102. 

 Notice of different unsuccessful attempts to ascertain and ac- 

 count for the variations of the magnet, 102, 103. And of the 

 principal changes to which the magnetic needle is subject, 104, 

 105. Observations of Captain Flinders, on the inclination of 

 the needle, 106. Dangerous consequences of neglecting to 

 attend to the irregularities of the compass illustrated, 107-109. 

 Observations on the currents of the Atlantic, 110, 111. Proof 

 that the change of the variation is influenced by the nature of 

 the ship's cargo. 111. Character of the work, 112. 



Bake WELL (Mr.), theory of, to account for the production of sound, 

 by the opening of a subterraneous gallery, xvii. 152. His table 

 of vegetation at different heights, 176 



Balance, new one described, xi. 280 



< • observations on the construction of, xii. 40, 41 



' sensible one described, xx. 161, 162 



Balard (M.), on the means of testing for iodine, xix. 343 



Balloons, coal gas first applied to the inflation of, by Mr. Green, 

 xiii. 114. Account of his ascent from Portsea, 115. Observ- 

 ations and experiments made during the voyage, 116. Remarks 

 thereon, 117, 118 



Balsams of Peru and Tou, identity of, ascertained, x. 28. How 

 obtained, ibid, 



Baltic Sea, observations on the atmosphere of, xii. 341-342. 



Bamboo, account of, v. 46-48, particularly those of South America, 

 48-50, andof the tabasheer, or inspissated juice of the South 

 America bamboo. 



