CONTENTS OF VOL. I. 
. 
On the mutual communication of Feeling. 
1. By Sounds. Voice, Natural language. Acquired 
language. Singing birds. Origin of differences in 
human speech, the causes will always exist. 
2. By signs addressed to the eye. Natural signs, ges- 
tures. Luminousness. Acquired signs. 
3. By signs addressed to the touch. 
Restraint. The terms Will and Free agency synony- 
mous with attention. Restraint more easily exer- 
cised over our intellectual, than over our instinc- 
tive powers. ‘ . . 
Difference between Reason and Instinct. The terms 
restricted. Dignity of man. Distribution of ani- 
mals by Lamark, according to their intelligence. 
CHAP. XIT. 
Digestive System. 
Hunger. Thirst. Kinds of food. Elements which 
nourish. How the food is seized, arms, claws, ten- 
tacula, lips, cutting teeth. Mastication, saliva, De- 
glutition, pharynx, gullet, stomach. Gastric juice. 
Digestion, chyme. Intestines, duodenum ;_pacre- 
as; liver, gall-bladder, bile; jejunum, ilium, co- 
lon, cecum, rectum. Peristaltic motion. Disen- 
gaged gases. Spleen. Peritoneum, Omentum, 
Mesentery. 
CHAP. XIII. 
Circulating System. 
Pulmonic vessels. Lacteals, chyle, thoracic duct. Lym- 
phatics. Veins, vene cave. The heart, pericardi- 
um, pulmonic auricle, pulmonary artery. 
XXVY 
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