The National Geographic Magazine, Volume 64National Geographic Society, 1933 - Geography Indexes kept up to date with supplements. |
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Page 175
... silk . As these float upward and away they lift the spin- ner's abdomen . Then more silk is spun . Out and out it goes , until finally the spiderling is seen clinging to his perch only by the tips of his legs , so strong is the pull of ...
... silk . As these float upward and away they lift the spin- ner's abdomen . Then more silk is spun . Out and out it goes , until finally the spiderling is seen clinging to his perch only by the tips of his legs , so strong is the pull of ...
Page 177
... SILK FOR MAN'S USE The possibility of the utilization of spider silk in the textile industry was investigated in France more than two centuries ago by Bon , a pioneer enthusiast , who collected a large number of spider cocoons ...
... SILK FOR MAN'S USE The possibility of the utilization of spider silk in the textile industry was investigated in France more than two centuries ago by Bon , a pioneer enthusiast , who collected a large number of spider cocoons ...
Page 179
... silk , and that 5,400 would produce enough silk for a lady's dress . Although spider silk proved impractical for textile use , the improvement of optical instruments brought with it a real commer- cial need for the silk in making a ...
... silk , and that 5,400 would produce enough silk for a lady's dress . Although spider silk proved impractical for textile use , the improvement of optical instruments brought with it a real commer- cial need for the silk in making a ...
Contents
CubaThe Isle of Romance By ENRIQUE C Canova 345 | 43 |
Eagles Hawks and Vultures 5 ills in color from paintings by MAJ ALLAN BROOKS | 64 |
Exploring the Secrets of Persepolis By CHARLES BREASTED 381 | 213 |
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