DECEMBER 9, 1876.]} Scientific Aiwevican. 373 and with full confidence in their almost absolute truthful- | ness as applied to circles of moderate size. Rochester, N. Y. E. B. WHITMORE. upon a round or uneven surface. The Earth’s Motion. … section of over one hundred feet in length, of an arcof one ter, and upon it slidesthe piece of brass tube, B, upon which Our two halves will be of the proper curve at the end to fit hundred feet radius, in which arc the earth would be but one is contrived a support for the sliding arm, C, as well…
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