The Science record; a compendium of scientific progress and discovery . s off the project-ing and irregular portions of the plugs, leaving the inte-rior surface perfectly true and smooth. In Fig. 3 is represented a bearing, part of which is cutaway to show the manner of introducing the metaline, insection. At A, in the same figure, is a collar, which re-volves with the shaft, and of course rubs against the edgeof the box; the manner of providing against friction bya similar arrangement of metaline disks, as already de-scribed, is here indicated, the plugs being inserted direct- 334 SCIENCE REC
The Science record; a compendium of scientific progress and discovery . s off the project-ing and irregular portions of the plugs, leaving the inte-rior surface perfectly true and smooth. In Fig. 3 is represented a bearing, part of which is cutaway to show the manner of introducing the metaline, insection. At A, in the same figure, is a collar, which re-volves with the shaft, and of course rubs against the edgeof the box; the manner of providing against friction bya similar arrangement of metaline disks, as already de-scribed, is here indicated, the plugs being inserted direct- 334 SCIENCE RECORD. ly in the sides of the collar. Fig. 4 shows how the me-taline is applied in cases where the inner periphery of thebearing is inaccessible. A collar, Fig. 5, of suitable size,is made and fitted with disks as represented, and insertedin the bearing, which is suitably enlarged to receive proceeding is applicable to very small shafts, as mill-spindles, etc. In certain cases where it might be prefer-able to avoid altering the bearing, the shaft is slotted and. METALINE—METHODS OF USE. the metaline forced in under strong pressure, in the posi-tions depicted in Fig. 6. Lastly, Fig. 7 represents a stepfor a mill-spindle or any upright swiftly rotating shaft,notably of the kind used in supporting the cutter headsin wood-working machinery. Here a conical cup of brassis fitted with plugs as shown, and secured in a suitablecavity in the heavier portion. The mode of applicationmust necessarily vary greatly with the construction of the MECHANICS AND ENGINEERING. 335 machine, and other attending circumstances ; and we mayadd that many varieties are made, to adapt the materialto different speeds, pressures, weights, etc. At the workshops of the American Metaline Company,No. 61 Warren street, New-York, various kinds of experi-mental machines may be seen in motion, and, amongothers, there is a mill-spindle, rotated at the rate of 8000
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