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- Date:
- 1906
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- July 19, 2022
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- on a large scale by the shadow method. The level of liquids in differently shaped vessels, is best
- Date:
- 1906
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- 306 OPTICAL PROJECTION produced by holding a piece of glass more or less smoked in front of the
- Date:
- 1906
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- 336 OPTICAL PROJECTION spectra by reflection; but much more brilliant spectra are projected if it
- Date:
- 1906
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- of a metal is projected by construct- ing Despretz' apparatus within the compass of the lantern, as
- Date:
- 1906
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- LIGHT: COLOUR 301 red ink, poured over glass, dried, and treated in the same way t are red by
- Date:
- 1906
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- which are strained membranes of very thin rubber, held by elastic bands catching in grooves cut round
- Date:
- 1906
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- LIGHT: COLOUR 291 Fio. 158.—Trough prisms by what is called a polyprism, of glasses ranging from
- Date:
- 1906
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- like fig. 117 laid on the vertical attachment, or less perfectly by direct projection in a cubical tank
- Date:
- 1906
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- the objective o, and is screwed with the standard E. M. S. screw, is roughly focussed by the rackwork
- Date:
- 1906
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- July 19, 2022
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- 204 OPTICAL PROJECTION only some of the coarsest can be shown even imperfectly by the lime-light
