XXVI CONTENTS OF VOL. ‘'t. 
Page. 
The Blood. Its mechanical structure, serum, globules, 
coagulation. Chemical constitution, ada clot, 
colouring matter. : 345 
Aerating organs. Lungs and gills. a ee Lar- 
ynx. Changes produced in the air by respiration. 
Changes in the blood, colour, density, specific 
heat. Quantity of oxygen consumed, variable . 348 
Systemic vessels. Heart, aorta, arteries, capillary 
vessels. : . 356 
Urinary system. ee Bladder. Urine. Caleuli. 359 
CHAP. XIV. 
Peculiar Secretions. 
1. Luminousness. Animals which are luminous. Se- 
creting organs, how excited. é ; 364. 
2. Electricity. Electrical organs. Influence of ie nerves. 367 
3. Heat. Warm and cold blooded animals. Laws of 
animal temperature. Power of generating heat or 
cold. Possessed even by eggs. Influence of the 
skin, muscles, nerves, digestion and respiration. 
Morbid states. Origin of animal heat. Theories 
of Buack and Crawrorp insufficient to explain the 
phenomena. The idea of life inconsiderately ex- 
cluded. y % ‘ ; 376 
CHAP... XV. 
Reproductive System. 
1. Viviparous Animals. Male organs, testicles, seminal 
vesicles, prostate gland, Cowper’s glands. Seminal 
fluid. Female organs, ovaria, corpora lutea, ovi- 
duct, uterus. Impregnation, myterious. Puberty. 
Gravid uterus, placenta, chorion, amnios, liquor 
amnii. Allantois. Foetus, how nourished. Deter- 
mination of sex. Gestation. Birth. Milk, . 890 
