VUl CONTENTS. 



situation would be inconvenient, 137 ; variety of figure, 138 ; 

 how many things must be right for health, 140 ; variety, 

 quickness, and precision of muscular motion, 141 ; tongue, 

 ib.; mouth, 143 ; nose, 145 ; music — writing, 146; sploinc- 

 ters, 147; combination of muscles, 148; delicacy of small 

 muscles, 149; mechanical disadvantages, i6. ; single mus- 

 cles, 151; lower jaw, i6. ; slit tendons, 152 ; bandage at 

 the ankles, 153 ; hypothesis from appetency repelled, 154 ; 

 Keill's enumeration of muscles, ib. ; why mechanism is not 

 more striking, 155; description inferior to inspection, i6.; 

 quotation from Steno, 156. 



J^ote 34, on the balance of action between the antagonist muscles, 

 134; 35, on the sacrifice of power in certain muscles, in 

 order to require velocity, 139 ; 36, on the complexity of 

 structure in the tongue, 146. 



CHAPTER X. 



OF THE VESSELS OF ANIMAL BODIES. 



i. The circulation of the blood, 158; disposition of the blood- 

 vessels, 159 ; arteries and veins, 160 ; ii. hearl, as receiving 

 and returning the blood, 162 ; heart, as referable to the 

 lungs, 164; valves of the heart, 170 ; vital motions involun- 

 tary, 175 ; pericardium, 176; iii. alimentary system, 177 ; 

 passage of the food through the stomach to the intestines, 

 178; passage of the chyle through the lacteals and tho- 

 racic duct to the blood, 179; length of intestines, 180; 

 peristaltic motion, ih. ; tenutity of the lacteals, 181 ; valves 

 of the thoracic duct, ih.; entrance at the neck, 182; diges- 

 tion, ib. ; iv. gall-bladder, 185; oblique insertion of the 

 bihary duct into the intestines, 187 ; v. parotid gland, ib.; 

 vi. larynx, J88; trachea — gullet— epiglottis, 189, 190; 

 rings of the trachea, 191 sensibihty, ib. ; musical instru- 

 ment, 192; lifting the hand to the head, 195. 



JsToU 37, referring the Appendix for a dissertation on the circu- 



