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Article XXXVIII. 



Defer iption of a Model of a Machine for communicating 

 Motion at a Dijlance. 



[In a Letter to the Secretary.] 

 SIR, Brijiol, Nov. 21, 1786. 



A Commodious method of communicating mo- 

 tion at a diftance, has long flood among the 

 defiderata of mechanics, and no method that I know 

 of has been attempted, that at the fame time will 

 free the machine from weight and incumbrance. 

 Hollow fhafts of caft-iron bid faireft to anfwer this 

 end, but they are expenfive; and though I fuppofe 

 it may be cheapen:, all things confidered, it will be 

 difficult to make them general. 



The method introduced to you by the model ac- 

 companying this letter, was tried and approved of 

 at a mill in the neighbourhood of this city, on two 

 fhafts, one 15 feet long and 15 inches thick, and 

 the other 1 2 feet long and 1 2 inches thick -, the latter 

 of which was fo weak as to twift near a tenth of its 

 circumference j which, when the refinance became 

 in any wife unequal, fubjected the whole machine 

 to the greater!: danger and diforder. 



Jt was propofed and intended to take it out and 

 fubftitute a larger, which would have been attended 



with 



