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Scientific American, Vol. 66, No. 13 (March 1892) (1892)

leaf 9

An illustration from Scientific American, Vol. 66, No. 13 (March 1892), 1892, leaf 9
ed as the most complete and this time the idea of speech transmission was an un- square in the ordinary position for use as a square, a perfect in every respect in the world. dercurrent of thought with him, and he has testified flat bar spring is located in a shallow recess in one side, The total… … He is said to have been greatly impressed by the draw- upon powdered retort charcoal. Upon distilling such A BIRD'S EYE VIEW OF THE GREAT EXPOSITION. backs incident to the employment of the commutator a mixture in a current of hydrogen, when the mercury and collecting brushes on dynamos and motors.…

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