Boston Journal of Philosophy and the Arts: Intended to Exhibit a View of the Progress of Discovery in Natural Philosophy, Mechanics, Chemistry, Geology and Mineralogy, Natural History, Comparative Anatomy and Physiology, Geography, Statistics, and the Fine and Useful Arts, 2권Cummings, Hilliard, & Company, 1825 |
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42 페이지
... ball of the hygrometer . In this man- ner the interior ball was cooled to 0 ° , without the appear- ance of any dew . The temperature of the water and air were , in this instance , 58 ° , and the pressure of the atmos- phere 30.5 . From ...
... ball of the hygrometer . In this man- ner the interior ball was cooled to 0 ° , without the appear- ance of any dew . The temperature of the water and air were , in this instance , 58 ° , and the pressure of the atmos- phere 30.5 . From ...
167 페이지
... ball was blown of black glass , and the halves of degrees could be very readily observed on its scale . The surfaces of both balls being alike vitreous , they would be equally affected by any simple heat . If , therefore , a glass ...
... ball was blown of black glass , and the halves of degrees could be very readily observed on its scale . The surfaces of both balls being alike vitreous , they would be equally affected by any simple heat . If , therefore , a glass ...
196 페이지
... balls . They reject every fragment which will not pass through the ring . Besides this instrument , Mr McAdam makes the in- spectors carry a balance , with a weight of six ounces , to weigh two or three of the largest fragments in each ...
... balls . They reject every fragment which will not pass through the ring . Besides this instrument , Mr McAdam makes the in- spectors carry a balance , with a weight of six ounces , to weigh two or three of the largest fragments in each ...
212 페이지
... ball , thirteen inches in diameter and placing his compass above this , he found , as in the case of the bar , that the north end of the needle was attracted by the ball ; that , when it was placed below it , the south end was attracted ...
... ball , thirteen inches in diameter and placing his compass above this , he found , as in the case of the bar , that the north end of the needle was attracted by the ball ; that , when it was placed below it , the south end was attracted ...
213 페이지
... ball , and assuming the direction of the dipping needle as a principal axis to the same , its extremities forming the poles , he was immediately in pos- session of an ideal magnetic sphere , by which to indicate the relative position of ...
... ball , and assuming the direction of the dipping needle as a principal axis to the same , its extremities forming the poles , he was immediately in pos- session of an ideal magnetic sphere , by which to indicate the relative position of ...
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