{"newspaper_name": "The Wilmingtonian, and Delaware advertiser.", "edition": "01", "page": "p2", "byline": ""}
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Poyver IF tie 1IuScies.--One Of the most
wonderful properties Of the muscles, is the
extraordinary force they exert, although
they are composed of such slender threads or
hbres. The following facts, in relation to this
point, are demonstrated by the celebrated
Borelli in his work De Motu .d,limQLuy.
When man lifts with his teeth, weight
of two hundred pounds, with rope fasten


ed to the jaw teeth, the muscles named
Temporalis and Massetes, with which peo-
pie chew, and which perform this work, ex-
ert force of above fifty thousand pounds
weight. lfany one hanging his arm direct.
ly downwards. lifts weight OF 90 pounds
with the third or last Joint of his thumb u.