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fame center as the principal hand. But a triangle, whofe bafe is 

 equal to half its fide, is of all the figures I have tried the moft 

 diftind. 



The night-telegraph remains flill to be defcribed ; its ufes 

 are perhaps more extenfive than thofe of the telegraphs I have 

 already publifhed ; and I propofe to make it the fubjed of ano- 

 ther paper upon a future occafion. 



The art of conveying fwift and fecret intelligence is not one 

 of thofe inventions which attrads attention only by its novelty ; 

 on the contrary I am convinced that it will be thought more va- 

 luable the longer it has been fubmitted to the teft of time 

 and experience. 



