ffected by either strong cur- / are so proportioned that the resistance opposed by mere motion is not enough to serve the ends of man- them to the action of the disks is at all times equal. rents of air or similar causes, and we see no reason ufacturers. These truths are self-evident, but it is why… … is also handsome in ap- differenceis, that the port- pearance, simple in construction, not liable to de- able engine generally has, and ought to have, more grooved pulley, which transmits the variation of the heating surface in its boiler as compared with the shaft, caused by the action of the…
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