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Auszug aus einem Briefe des Hrn. Th. Earnshaw an den Herausgeber.

โœ Scribed by Thomas Earnshaw


Publisher
John Wiley and Sons
Year
1823
Tongue
English
Weight
108 KB
Volume
1
Category
Article
ISSN
0004-6337

No coin nor oath required. For personal study only.

โœฆ Synopsis


Jiirgensens proposal of altering my Escapement to two wheels instead of one, instead of being a reduction of friction, appears to me to be an increase of i t , and certainly more labour and expense.

What can he mean by a reduction of friction in t h e manner I have made my Timekeepers? Some of the oldest of them which have been going for more than 40 years do n o t exhibit the least wear on the pallets, on which the wheel acts.

Is not this something like proof that the friction he mentions, does not exist? If he still holds the samc opinion let him make it, and I most heartily wish, h:in sucxl's in his endeavours of directing the wandering sailor in his right way acrofs the trac1:Iefs ocean.


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Auszug aus einem Briefe des Herrn Oriani
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Je joins Q cette lettre un petit rapprochement d'un Memoire 'de M. Bessed inserg dans le Nr. 86 A. N. avec les 616mens de trigonomCtrie sphkoidique, que vous con- noissez. La formule (11) pag. 247 Nr. 86 k. N. revient a la derniere du 4.36 des E l e m e n t i d i T r i g o n . s f e r o i d . Car en