Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 583
he piece BB, so that it can be placed near or farfrom the object to be examined. Moreover, the rod c, and all the otherpieces of the apparatus, rest on a horizontal axis A, with which they turnunder so much friction as to remain fixed in any position in which they maybe placed. The object to be… … Fig. 550. on a jointed support so that it can be placed in any position whatever, soas to reflect to the object either the diffused light of the atmosphere, or thatfrom a candle or lamp. Between the reflector and the stage is a diaphragmor stop, K, perforated by four holes of different sizes, any…
Physics
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