78. INDEX. 



Fielder and Hagen (MM.), [observations of, on sand-drigs of 



fulgorites, xvii. 181 

 Fields of ice, account of the generation of, iv. 251 ; and of their 



tremendous concussions, 253 

 Fig-trees, hints on the management of, vii. 169 

 Figure (of the earth), observations on the operations undertaken 



for determining, v. 340-351 



observations on, viii. 108. ix. 32. xx. 141 



of the heavenly bodies, observation on the apparent 



changes in, x. 9 

 Figures (Arabic), conjectures upon the original formation of, i.l 66 

 Filberts, fertilization of the female blossoms of, xv. 107 

 Finch (Mr.), account of a land-slip, by, xiv. 455 

 . description of a Roman camp by, at Mitchley near Bir- 

 mingham, xvi. 24 

 Fire, experiments to prove that it has weight, xi. 260. By its 



heat can thicken homogeneous bodies, xii. 56. Can thicken 



water, 58 ; and air, 61 

 Fire-damp, explosion from, v. 370. viii. 382 

 Fire-escape, simple, described, vi. 139 

 Fire (green), component parts of, xiv. 232 

 Fire-places, observations on the construction of, vi. 364 

 Fire (red), how obtained, ix. 411 

 Fire, extinction of, in chimneys, xvi. 156 

 Fish, Chinese mode of hatching, xvii. 176 

 ' experiments on the transportation of, from salt to fresh 



water, xvii. 209. xix. 238. On the generation of fish, xvii. 



277 

 Fish oil, mode of purifying, xiii. 423 

 Fisher (Mr.), astronomical observations of, during the Arctic 



Expedition, v. 299 

 observation of, on the figure of the earth, as deduced from 



the measurement of arcs of the meridian, and on pendulums, 



vii. 299 

 ' obseiTations of, on the variation of the compass observed 



in the late Voyage of Discovery to the North Pole, ix. 81 



