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" ... winch, with as little labour as it takes to wind up a jack, though the weight of the iron, tin, and wooden circle, is about 1000 pounds. "
Dictionary of the Mathematical and Physical Sciences, According to the ... - Σελίδα 203
επεξεργασία από - 1823 - 576 σελίδες
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Travels Into Poland, Russia, Sweden, and Denmark: Interspersed with ..., Τόμος 2

William Coxe - 1785 - 626 σελίδες
...are propofed to ". follow : the whole is turned round with a fmall winch, with as little labour <c as it takes to wind up a jack, though the weight of the iron, tin, and '* wooden circle, is about a thoufand pounds. When it is made ufe of, a •* planetarium will be placed in the middle thereof. The...

Travels Into Poland, Russia, Sweden, and Denmark: Interspersed with ..., Τόμος 3

William Coxe - 1787 - 498 σελίδες
..." the reft of the conftellations are propofed to follow : the " whole is turned round with a fmall winch, with as little " labour as it takes to wind up a jack, though the weight <c of the iron, tin, and wooden circle, is about a thoufand " pounds. When it is made ufe of, a planetarium...

Encyclopædia Britannica: Or, A Dictionary of Arts ..., Τόμος 10,Μέρος 1

Colin Macfarquhar, George Gleig - 1797 - 422 σελίδες
...pole ; the reft of the conftellations are propofed to follow : the whole is turned round with a fmall winch, with as little labour as it takes to wind up...weight of the iron, tin, and wooden circle, is about 1000 pounds. When it is made ufe of, a planetarium will be placed in the middle thereof. The whole,...

Travels into Poland, Russia, Sweden and Denmark, Τόμος 3

William Coxe - 1802 - 428 σελίδες
...pole j the reft of the conftellations are propofed to follow : the whole is turned round with a fmall winch,- with as little labour as it takes to wind...weight of the iron, tin, and wooden circle, is about a thoufand pounds* When it is made ufe of, a planetarium will be placed in the middle thereof. The whole,...

Travels in Poland, Russia, Sweden, and Denmark: Illustrated with ..., Τόμος 3

William Coxe - 1802 - 430 σελίδες
...pole ; the reft of the conftellations are propofed to' follow : the whole is turned round with a fmall winch, with as little labour as it takes to wind up a jack, though the weight of <&he iron, tin; and wooden- circle, is about a thoufand pounds. When it is made ufe of) a planetarium...

Exercises on the globes: interspersed with some historical, biographical ...

William Butler - 1803 - 434 σελίδες
...globe is a reprefentation of the heavens,., having the fixed ftars described upon it in their «• with as little labour as it takes to wind up a jack,...weight of the iron, tin, and wooden circle, is about a ** tTioufand pounds. When it is maie ule of, a planetarium " will be placed in the middle thereof....

New Cambridge Guide; Or, A Description of the University, Town, and County ...

1804 - 476 σελίδες
...conveniently sit within it. The entrance to it is by six steps ; and the whole is turned round by a fmall winch, with as little labour as it takes to wind up a jack, though its weight altogether is above lOOOpouacis. This curious machine is now pinch damaged, and fast falling...

A Guide Through the University of Cambridge: ...

1808 - 212 σελίδες
...constellation* and stars traced. The constellations may he ohserved in their respective situations. The whole is turned round with a small winch, with as little lahour as it takes to wind up a jack ; though the -weight of the iron, tin, and wooden circle, is ahove...

The Beauties of England and Wales, Or, Delineations, Topographical ..., Τόμος 2

1809 - 616 σελίδες
...constellations are proposed tn follow. The whole is turrtA round with a small winch, with as little l.<hor as it takes to wind up a jack : though the weight of the iron, tin, and wooden ciiclf, is above toco pound* When it is made use of, a planetaiium will be placed in the middle thereof;...

Encyclopædia Britannica: or, A dictionary of arts and sciences ..., Τόμος 12

Encyclopaedia Britannica - 1810 - 816 σελίδες
...pole ; the reft of the conftellations are propofed to follow : the whole is turned round with a fmall winch, with as little labour as it takes to wind up...weight of the iron, tin, and wooden circle, is about 1000 pounds. When it is made ufe of, a planetarium will be placed in the middle thereof. The whole,...




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