A quadruplet of inventions / [Thomas Northmore].

  • Thomas Northmore
Date:
[1799]
Catalogue details

Licence: Public Domain Mark

Credit: A quadruplet of inventions / [Thomas Northmore]. Source: Wellcome Collection.

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    [14 ] perience, and will vary according to the diftance of the obfervatory. I have fixed on four lamps, as being the number that appears belt to unite fimplicity and perfpicuity. To convert this machine into a Diurnal Telegraph, nothing more is neceffary than to infert, in the place of the lamps, gilt balls, or any other confpicuous bodies. It is evident that the principle upon which this machine depends, is, the number of changes, or variety of por¬ tions, which can be produced from a given number of moveable obje6ts ; and I make this remark becaufe it appears to me, that nothing can tend fo much to the improvement of human inventions, as a clear, and concife ftatement of the principle upon which they depend. It fhould be their conftant appendage, as the moral is to a fable; for men in ge¬ neral are too indolent to exert their powers
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