s constructed ; it is little the one most commonly used is an ordinary if so, how to find the focal length for focuss- more than a toy, but a very pretty and use- ring of iron pipe with several holes bored ing-glass ? ful one. in it, but in use it is most unpleasant, and Gas-Black as Ebony Stain.… … CONTRIVANCE FOR HEATING BATH. Removal of Ink Stains from Ivory. Varnish for Tracing- Paper. The boiler I intend making of copper and H. A. D. (Belfast) wishes to be informed J. C (Bursley) writes : — I have a receipt brazing the cone on to the bottom ; the gas how he may remove ink stains from…
Industrial arts · Handicraft
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