INDEX. 339 
Domestication, effects of, on birds, 123, 125. 
Dormice, experiments with, 109, 110. 
Dyticus marginalis specifically lighter than water, 221: average 
weight of, 221: experiment with, 112. 
Eaton, Mr., his account of a young Cuckoo which was fed by 
__ birds of different species, 77, 
Education of birds, 32, 33, 142. 
Eggs, number of, laid by the Cuckoo, 58: mean weight of, 63: 
how those of birds in whose nests Cuckoos lay are frequently 
; injured, 65. 
Elasticity, extraordinary instance of, 288. 
Electricity does not occasion the ascent of aéronautic spiders and 
gossamer, 263. 
Epeira apoclisa, number of viscid globules in the net of, 298. 
calophylla, peculiarity in the net of, 281, 282. 
Fawn of the Fallow Deer brought up by a Spaniel, 205. 
Fieldfare migrates in the night, 24. 
Fish, on changes in the colour of, 2038. 
Fleming, Dr., mistaken concerning the economy of the Cuckoo, 
79. 
Flycatcher, sagacity of, 134. 
, Pied, observations on, 147: vicinity of Ullswater a fa- 
vourite haunt of, 147: occurs in the valley of the Conway, 
150: a singing bird, 148: is migratory, 149: anecdote of, 
150. 
Garside, Mr., his aviary, 172, 173. 
Gecko (lizard) adheres to polished bodies by means of a mucous 
secretion, 225. 
Glowworm, larva of, its organ of adhesion, 224. 
Gossamer, most abundant in September and October, 258: how 
produced, 258: ascent of, explained, 259, 260. 
Gough, Mr., his observations on the supposed winter retreats of 
the periodical summer birds, 10. 
Greenfinch, young of, experiment with, 37. 
Grenadier Grosbeak, some account of, 172: its weaving propen- 
sity, 174. 
Heineken, Dr. C., his discovery of the connexion which exists 
between the moulting of spiders and the reproduction of 
their limbs, 310. 
Home, Sir Everard, his investigation of the structure and func- 
tion of the pulvilli of flies, 216, 218. 
