of the roller is seen in Fig. 2, but they could not give any reasons for thinking so. I can- to you the cause of those beautiful phenomena." which is a longitudinal vertical section. It consists of alter- not consistently place much reliance on such groundless opin- Mr. Crosse appeares to have… … in a current of air, and propelled by no other force, could be Seems strange that the principles of its construction should guided by sails, is a folly which our readers will appreciate not be generally understood, yet such is the case. To without further remark." nate disks of iron, C, and rubber,…
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