chanical impurities is poured of wheels set at equal distances around a circular A punch for making bolt apertures in rails, and into a glass tube, into the lower end of which is track ; on the circumferences of these the dome rolls. specially intended to supersede the use of the ratchet cemented a… … spheric pressure varies greatly, the HULME’S RAIL PUNCH. apparatus can be left.at work night and day, and only requires the addi. and drill for such purpose, is illustrated herewith, and tion of mercury two or three times in has been patented ‘by Mr. Isaac Hulme, of’ Yaquina, 24 hours. Oregon. On a…
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