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" The rod should be firmly and steadily grasped -, for if, when it has begun to be attracted, there be the least imaginable jerk or opposition to its attraction, it will not move any more till the hands are opened, and a fresh grasp taken. The stronger... "
Mineralogia Cornubiensis: A Treatise on Minerals, Mines, and Mining ... - الصفحة 118
بواسطة William Pryce - 1778 - عدد الصفحات: 331
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Encyclopædia Britannica: Or, A Dictionary of Arts ..., المجلد 12،الجزء 1

Colin Macfarquhar, George Gleig - 1797
...a^d fteadily grafped ; for if, when it hzs begun to be attrafted, there be the leaft imaginable jerk or oppofition to its attraction, it will not move...rod in many hands is defeated purely by a jerk or counteraction : and it is from thence concluded, th:u there is no real efficacy in the rod, or that...

A Tour Through Cornwall, in the Autumn of 1808

Richard Warner - 1809 - عدد الصفحات: 363
...hath begun to be attrafted there be " the least imaginable jerk, or opposition to its M attraftion, it will not move any more, till the " hands are opened and a fresh grasp taken. The " stronger the grasp, the livelier the rod moves, *' provided the grasp be steady,...

Encyclopaedia Britannica; Or A Dictionary of Arts, Sciences, and ..., المجلد 14

1823
...grasped -, for if, when it has begun to be attracted, there be the least imaginable jerk or opposition to its attraction, it will not move any more till the hands are opened, and a fresh grasp taken. The stronger the grasp the livelier the rod moves, provided the grasp be steady...

A treatise on British mining; with a digest of the cost book system ...

Thomas Bartlett (of Lombard st.) - 1850 - عدد الصفحات: 87
...grasped, for if, when it hath begun to be attracted, there be " the least imaginable jerk, or opposition to its attraction, it " will not move any more till the hands are opened and a " fresh grasp taken ; the stronger the grasp the livelier the " rod moves, provided the grasp be steady...

The Mining and Statistic Magazine: Devoted to Mines, Mining ..., المجلد 10

1858
...want of attention to this. If, too, there be the least jerk or opposition to its attraction, the rod will not move any more till the hands are opened, and a fresh grasp taken. A number of minute cautions of this nature are given, and, if failures occur, people...

The world of wonders: a record of things wonderful in nature, science and ...

World - 1868
...grasped ; for when it has begun to be attracted, if there be the least imaginable jerk or opposition to its attraction, it will not move any more till the hands are open and a fresh grasp taken. The stronger the grasp, the livelier the rod moves, provided the grasp...

The world of wonders: a record of things wonderful in nature, science and ...

World - 1874
...grasped ; for when it has begun to be attracted, if there be the least imaginable jerk or opposition to its attraction, it will not move any more till the hands are open and a fresh grasp taken. The stronger the grasp, the livelier the rod moves, provided the grasp...

A History of the Trade in Tin: A Short Description of Tin Mining and ...

Philip William Flower - 1880 - عدد الصفحات: 219
...grasped, for, if when it hath begun to be attracted there be the least imaginable jerk or opposition to its attraction, it will not move any more till the hands are opened and a fresh grasp taken. " The stronger the grasp the livelier the rod moves, provided the grasp be steady...




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