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Document | Max. Freq | Min. Freq | ||
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Elizabeth Cary Agassiz, Louis Agassiz: his life and correspondence, third edition | 10 | 2 | Browse | Search |
Harper's Encyclopedia of United States History (ed. Benson Lossing) | 4 | 2 | Browse | Search |
Charles A. Nelson , A. M., Waltham, past, present and its industries, with an historical sketch of Watertown from its settlement in 1630 to the incorporation of Waltham, January 15, 1739. | 4 | 0 | Browse | Search |
The Cambridge of eighteen hundred and ninety-six: a picture of the city and its industries fifty years after its incorporation (ed. Arthur Gilman) | 2 | 0 | Browse | Search |
The Daily Dispatch: October 2, 1863., [Electronic resource] | 1 | 1 | Browse | Search |
The Daily Dispatch: January 31, 1865., [Electronic resource] | 1 | 1 | Browse | Search |
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Your search returned 22 results in 9 document sections:
The Cambridge of eighteen hundred and ninety-six: a picture of the city and its industries fifty years after its incorporation (ed. Arthur Gilman), General Index . (search)
Elizabeth Cary Agassiz, Louis Agassiz: his life and correspondence, third edition, Chapter 7 : 1832 -1834 : Aet. 25 -27 . (search)
Elizabeth Cary Agassiz, Louis Agassiz: his life and correspondence, third edition, Index. (search)
Charles A. Nelson , A. M., Waltham, past, present and its industries, with an historical sketch of Watertown from its settlement in 1630 to the incorporation of Waltham, January 15, 1739., March 19 , 1627 -8 . (search)
Charles A. Nelson , A. M., Waltham, past, present and its industries, with an historical sketch of Watertown from its settlement in 1630 to the incorporation of Waltham, January 15, 1739., Index. (search)
The Daily Dispatch: October 2, 1863., [Electronic resource], A remarkable Phenomenon...a Chapter of similar ones. (search)
The Daily Dispatch: January 31, 1865., [Electronic resource], Wonderful Minuteness. (search)
Wonderful Minuteness.
--Dr. Wollaston obtained platinum wire so fine that thirty thousand pieces, placed side by side in contact, would not cover more than an inch.
It would take one hundred and fifty pieces of this wire, bound together, to form a thread as thick as a filament of raw silk.
Although platinum is the heaviest of known bodies, a mile of this wire would not weigh more than a grain.
Seven ounces of this would extend from New York to London.
Fine as is the filament produced by the silk worm, that produced by the spider is still more attenuated.
A thread of a spider's web, measuring four miles, will weigh very little more than a single grain.
Every one is familiar with the fact that the spider spins a cord or thread by which his own weight is suspended.
It has been ascertained that this thread is composed of about six thousand filaments.