| 1767 - 640 pàgines
...To do this, it is not. neceflary that a watch mould perform its revolutions precifcly in that fpace of time which the earth takes to perform her's ; it is only icquired that it Ihould invariably peiform it in feme knoiun lime, and then the' conftant difference... | |
| 1795 - 492 pàgines
...To do this, it i» not r.ecefiary that a watch mould perform its revolutions precifely in that fpacc of time which the earth takes to perform her's ; it is only required that it ihould invariably perform it in f.mt kaa-.<.n time, an4 then the confiant difference between the length... | |
| Jeremiah Whitaker Newman - 1838 - 404 pàgines
...such observation is made, a time-keeper tells what o'clock it is at the place from which we sailed, our longitude is clearly discovered. To do this, it...space of time •which the earth takes to perform hers; it is only required that it should invariably perform it, and with regularity, in some known... | |
| Alan Gurney - 2007 - 338 pàgines
...failed to take into account the rate of the watch. "It is not necessary that a Watch should perform it's Revolutions precisely in that Space of time which the Earth takes to perform her's," snapped Harrison, "it is only required that it should invariably perform it in some known Time, and... | |
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