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BOTANIC PHYSICIAN. 
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yeins, absorbents, stomach, intestines, &&c. The mixed motions are, — 
those which are in part under the control of the will, but which or-— 
dinarily act without our being conscious of their acting ; as is per — 
ceived in the muscles of respiration, the abdominal muscles, and the — 
midriff, — E a % eg 
When a muscle acts, it becomes shorter and thicker ; both its — 
origin and insertion are drawn towards its middle. The constricting | 
muscles are always im action; and so likewise are antagonist mus: _ 
cles, even when they seem at rest. When two antagonisi muscles — 
moye with equal force, the part which they are designed to move 
remains at rest; but if one of the antagonist muscles remains at 
rest while the other acts, the part is moved towards the centre of — 
the most irritable; 
€ arteries, veins, a 
scles follow ; but the degree 
ma : 1 , either throu 
will, or any foreign body, it contracts, and it 
served by contraction: thus, the heart sees ree om | 
& fe Gren ee ee uniformly ; puncture a muscle an be 
_ the contents of the tec Spal mules acts slowly in expelling — 
—_ - muscles, and altehwetec = Succeods: my : 
eee = gaedieed = 18 very Considerable; for upon it de- 4 
3 oars = ; and every function except that of the 
