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Scientific American, Vol. 39, No. 16 (October 1878) (1878)

leaf 3

An illustration from Scientific American, Vol. 39, No. 16 (October 1878), 1878, leaf 3
r Isaac New- width of the slit can be altered, and the position of the ob- numerable circles then obliterates the circular form, except ton's *' Opticks," the work in which the foundations of our serving telescope and of the prisms can be adjusted so that at the extreme opposite ends, where the… … the refracting Angle of the Prism. And other difficulties prevent our going very far KIBCHHOFF'S SFECTBOSCOFE. whilst I viewed it, I held it and the Prism in this direction, and in some of the most before a window in such manner that the powerful instruments recently made the disposition has colors…

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