application to light manufacturing pur- worked ; and it can be made of any size, from forty-five, to concentration. Some one has suggested a long tube, but I poses of the usually high falls of city supplies, I used a two hundred feet of rounds. The engraving, Fig.1 represents do not see how that… … man’s labor, and the saving of our coal beds. tainly made a powerful reflection. a a are sections of or Cuas. E, FOWLER, C.E. conical tubes or rings; 0 D are thin, flat stays or braces, Peekskill, N. Y. holding the rings in their proper positions. The parallel ot dotted lines represent direct rays…
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