[ 3'5 3 



Besides rendering the telegraph fafe againft ftorms, and more 

 eafily manageable, I found by experience that one machine could 

 be made to perform the fame effedt as four, with but little lofs 

 of time } what took up four minutes with four pointers can be 

 conveyed in five minutes by one. I have alfo found, that by 

 anfwering each (ignal or number fliewn at every ftation, all polli- 

 bility of miftake is avoided. 



I BELIEVE that in other eftablifhments of this fort it has 

 been found that thick and foggy weather has occafioned more 

 interruptions than were expeded. With my telegraphs I have 

 good reafon to affert that there do not commonly occur above 

 eight or ten days in the year when intelligence might not be 

 conveyed by land. 



If eight men were pofled at each permanent ftation, at the 

 diftance of eighteen or twenty Englifh miles afunder, with ma- 

 chines of twenty-five feet high, in hazy weather, they might 

 detach two men with portable telegraphs to the diftance of about 

 fix miles from each ftation, who with eight foot telegraphs could 

 keep up a regular communication. 



R r a The 



manfhip and tools were preferved by thefe means, and by idegrees were coIle£ted 

 into publications of general circulation. 



I was required to deliver drawings of all the machinery I employed in the work 

 tarried on at Lyons in 1772 for turning the courfe of the Rhone. 



But in the tranfa£lions of a literary fociety fuch details would be tedious and 

 improper. 



