The young astronomer; or, The facts developed by modern astronomy, collected for the use of schools and the general reader (1847)
Abbott, John S. C. (John Stevens Cabot), 1805-1877 · New York, J.C. Riker [etc.] · leaf 107
rindstone 1 Supposefirst, that the rim is split in the middle, along the lineof the rim, and through about one-third of its circum-ference ; which split, however, does not reach so fardown as the centre of the grindstone; also, let thedivided parts be somewhat separated towards the mid-dle of the…
Astronomy
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