
NO MACHINE IS NEEDED FOR grinding and polishing telescope mirrors, and only a minority of amateur telescope makers use machines, since one's two hands are a good machine. Nevertheless, among advanced mirror makers who finally tire of pushing glass by hand, or who, following Yankee tradition need less than half an excuse to build a machine of any kind, machines are becoming more and more common. No machine has been copied so often as the one described by Hindle in the present (fourth) edition of "Amateur Telescope Making." This machine-now firmly established-is a pronounced success. Such a machine was built by Cyril G. Wates, 7718 Jasper Ave., Edmonton, Alberta, Canada, and described in the January, 1941, number of The Journal of the Royal Astronomical Society of Canada, 198 College St., Toronto, Ontario, a journal which, by the way, is entirely amateur even if "royal," and the following is a slight adaptation from that description.
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