Library of Useful Knowledge: Natural philosophy, Volume 2Baldwin and Cradock, 1829 - Physics |
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Page 48
... piece , they will be so much separated and weak- ened that the eye - piece will not be able to collect them truly . And it may be further remarked , that the power should always be obtained by the object - glass in preference to the eye ...
... piece , they will be so much separated and weak- ened that the eye - piece will not be able to collect them truly . And it may be further remarked , that the power should always be obtained by the object - glass in preference to the eye ...
Page 26
... piece of brass to that clos- ing the opposite extremity of the long one . The bar or rod to be examined abuts against the piece of brass y , it rests on the three rollers & s 8 , 1 inch in diameter , and is kept in the centre of the ...
... piece of brass to that clos- ing the opposite extremity of the long one . The bar or rod to be examined abuts against the piece of brass y , it rests on the three rollers & s 8 , 1 inch in diameter , and is kept in the centre of the ...
Page 6
... piece after piece , till the lower one will exert only suffi- cient attraction to sus- tain a very small weight of iron , such as a small needle . The polarities of the lower ends of each piece , if examined previ- ously to each additional ...
... piece after piece , till the lower one will exert only suffi- cient attraction to sus- tain a very small weight of iron , such as a small needle . The polarities of the lower ends of each piece , if examined previ- ously to each additional ...
Contents
POPULAR INTRODUCTIONS to NATURAL PHILOSOPHY By | i |
Page | xvii |
MARCET icx | 10 |
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acid action aperture appear ascer attraction axis ball battery body brass centre centre of gravity circle colours compass concave conductor convex convex lens copper cylinder degree diameter direction distance earth effect elec electric current electric fluid electroscope equal experiments Fahrenheit fixed flint glass focus force galvanic glass gravity heat horizontal hygrometer inch induction instrument intensity iron length lens lenses lever light magnet ment mercury metal motion move needle Newton north pole object object-glass obliquely observed opposite parallel particles passing perpendicular phenomena piece placed plane plate polarity portion position prism produced proportion pyrometer quantity rays reflected refraction refrangible rendered repulsion retina right angles ring round side south pole specific gravity spherical aberration steel substance surface telescope temperature theory thermometer thickness tion tricity tube velocity vertical voltaic weight wire zinc