54° The Account of a 



in Cornwall. Among the contents are likewise to be numbered 

 the bearings, distances, &c. of the stations and intersected objects, 

 from the parallels and meridians. 



The third and last section contains the triangles which have 

 been carried over Essex, the western part of Kent, and portions 

 of the counties joining the former, Suffolk and Hertfordshire. 

 It is with satisfaction I am enabled to state, that Mr. Gardner, 

 the chief Draftsman, with his assistants, has almost completed 

 the Survey of this extensive tract, which, no doubt, like the map 

 of Kent, will be given to the public : the materials for these 

 different surveys are ample, and will be found in this section, 

 which concludes with the altitudes of the stations and mean 

 refractions. 



Before I had advanced far in my work, I entertained ideas of 

 condensing all the data in my possession, and distributing them 

 in it ; but, when I found my paper would, in that case, be too 

 large for the Philosophical Transactions, I desisted, contenting 

 myself with presenting little more than a moiety : it is, even now, 

 of inconvenient magnitude, but I could not, with propriety, still 

 farther abridge it, for I have, in several instances, rejected im- 

 portant matter. I shall, therefore, take an early opportunity of 

 compiling a fourth account, in which will be given the latitudes 

 and longitudes of those places, in Essex, Kent, &c. found in the 

 last section. 



It is right I should observe that, knowing from experience, 

 how liable surveyors are to mistake the names of places, and 

 also, how utterly impracticable it is to detect errors, till the 

 interiors of the great triangles have been filled up, I have been 

 cautious to give only the distances of such objects as could not 

 be easily mistaken, I do not mean to insinuate that, among 



