lating the spindle which form an original series, worthy of close exam- parts and occupies but a very small space. supports the cones, and giving them a vibra- In connection with this machine, Mr. Boyn- ination, for carrying out in all its details this tory motion from side to side. Thisis forthe… … its bottom also, and these gear into teeth, a, ism. Ais the frame, B the saws, and C a width in proper proportion. The same will _ on the bottom of the other cone, A, impart- be true in any other position of the saws, as | ing motion to it; and then through the same lar guide slots. D are the…
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