ILLUSTRATIONS. XV 



No. Page 



46. An Egg as it appears seven days after incubation, with a 



magnified view of the Chick . . . .154 



47. An Egg as it appears eight days after incubation, with a 



magnified view of the Chick .... 154 



48. An Egg as it appears nine days after incubation . .155 



49. The same Egg turned more to its right side , . 155 



50. An Egg as it appears ten days after incubation . .156 



51. The Embryo Chick taken from the preceding Egg, with 



the amnion and vesicle removed . . . .157 



52. An Egg as it appears fourteen days after incubation . 158 



53. The same Egg, with the external half of the vesicle 



removed . . . . . . . .158 



54. The Embryo of the preceding Egg, opened to show the 



course of the principal blood-vessels which go to the 

 vesicle and to the areolar membrane . . . 159 



55. An Egg as it appears eighteen days after incubation . 160 



56. The same Egg, with part of the vesicle removed, to 



show the Embryo Chick more clearly . . . 160 



57. The Embryo Chick opened to show the absorption of the 



yolk into the body . . . . .161 



58. An Egg as it appears twenty days after incubation, the 



vesicle and amnion are removed, to show the position 



of the perfect Chick .162 



59. Position of the Chick in the Egg .... 164 



60. Position of the Chick in the Egg . . . .165 



61. Eggs fractured by the included Chick . . .170 



62. Positions of the Shell after the escape of the Chick . 171 



63. Artificial Mothers 184 



64. Improved artificial Mother . . 185 



65. Reaumur's Stove Hatching-house . . 187 



66. Artificial Mother for Water-fowls . . . .188 



67. Crops of Pigeons , . f . . . .191 



