126 STATISTICAL SURVEY 



Before I difmifs this fubjeft, I fhall beg leave to fog- 

 geft to the gentlemen of the county of Tyrone a plan, 

 which, I apprehend, might not be attended with much 

 expenfc. They are now in pofTeffion of the map of the 

 county, made out by Meffrs. William and Conyng- 

 ham M'Crea, in the years 1774, 1775, and 1776. 



Since that time, a great number of roads have been 

 made throughout the county, all of which are ufeful, 

 and many of them materially fo. In order to render this 

 map more complete, I apprehend, that all the roads, 

 which have been introduced fince it was finished, 

 might be furveyed, and laid down upon it. When this 

 part of the work fhall be completed, the gentlemen may 

 go further j a copper-plate might be made out, and a 

 great many impreflions ftruck off. The plate fliould 

 be the property of the fubfcribing gentlemen, and any 

 new lines, that may be introduced hereafter, might be 

 delineated on the plate, and thus have new impreflions 

 made out occasionally. 



I am informed, that artifts will agree to make out 

 the engraving, and ftrike off the maps, by allowing 

 them a certain number for their own emolument. The 

 certainty of this may be eafily known, by applying to 

 any of the eminent print -fellers. 



Bridges. 



A great miflake in bridge-building is, that the piers 

 and abutments are not well attended to, in having 



them 



