35 2 Sir Everard Home on the changes the egg undergoes 
Fig. 3. The same embryo, with the principal branches of 
its blood-vessels, turned upon its back, and laid upon a black 
ground. Magnified 6 diameters. 
Fig. 4. An egg, opened 3 days after incubation. Natural 
size. 
Fig. 5. A portion of the yelk and vascular areola, with the 
embryo in its centre, lying entirely on its left side, which is 
its natural position. Magnified 6 diameters. 
Fig. 6. The same embryo turned on its right side, and laid 
on a black ground. Magnified 6 diameters. 
Fig. 7. An egg, opened 4 days after incubation. Natural 
size. 
Fig. 8. The embryo in its amnion, and with its vesicle 
removed from the yelk, and laid in its proper position on a 
black ground. Magnified 4 diameters. 
Fig. g. The same embryo without its amnion, turned on 
its back, and laid on a black ground. Magnified 4 diameters. 
Plate XXXVI. 
Fig. 1. An egg, opened 3 days after incubation. Natural 
size. 
Fig. 2. The embryo in its amnion, and with its vesicle re- 
moved from the yelk, and represented in its natural position. 
Magnified 3 diameters. 
Fig. 3. The same embryo taken out of its amnion, and 
turned upon its back, having on its right side the increasing 
vesicle, and on its left a small portion of the areolar mem- 
brane with the principal trunk of the blood-vessels. Magnified 
3 diameters 
Fig. 4. An egg, opened six days after incubation. Natural 
size. 
