Hcemajlatks. 
175 
Silk Spider’s Flax Human Horfc 
Thread Hair Hair 
3 i 9 ^ 5 ' 15800. 11710. 5?^55. 75)70. 
Whence he collefts, that the finer the com- 
‘‘ ponent Threads are, the ftronger they are. 
42. He found alfo that a Cord of amu- 
“ fical Inftrument which is made of Animals 
Guts, fuftained thrice as much as a Hor(c 
‘‘ Hair of equal Size. 
45. A Thong of Leather of a Calf’s 
Skin which was 0.4 twelfths of an Inch 
broad, and 0.08 thick, fcarcc fuftained eigh- 
ty Pounds. 
44. A Thong of Leather of an Oxs 
Hide w^hich was 0.4 twelfths of an Inch 
broad, and 0.18 thick, fuftained three hun- 
“ dred and eighty Pounds, whence he takes 
‘‘ occafion to eftimate the Strength of the 
‘‘ leathern Traces by which a Coach is fufpend- 
“ ed, viz, for fince fuch'a Thong of four 
Lines or 3d of an Inch Breadth will fuftain 
three hundred and eighty Pounds, one of 
three Inches Breadth will fuftain 3420 
‘‘ Pounds, and five fuch fewed together to 
make a Brace may fuftain a Weight equal 
[[ to 17100 Pounds; and four ftich Braces 
‘‘ doubled. 
