1 1 2 Gen . Roy’s Account of 
extend along the Englifh coaft, with thofe formerly executed 
on the coaft of France, oppofite to Dover. And Dr. Blag- 
den (who for this purpofe confented to lay afide his intention 
of making a tour through Germany that fummer) had engaged 
to affifl in the bufinefs, on the appointment of the Royal So- 
ciety, whenever we fhould be enabled to affign any probable 
time, for the different parties to repair to their refpeftive coafts, 
for the aforefaid co-operation. * 
About the fame time likewife, a Paper was laid before the 
Royal Society, intended as a fketch of the mode propofed to 
be followed in carrying the fcheme into execution ; for which 
purpofe it was accompanied with a general map, filewing 
nearly the difpofition of the triangles, and containing alfo va- 
rious inveftigations concerning the figure of the earth, whereon, 
it is hoped, the refult of the prefent operation will throw fome 
additional light. 
. For feveral months of the fpring and fummer of 17S7, Mr. 
Ramsden had been ferioufly at work in endeavouring to finifii 
the inftrument. Not having employed a fufficient number of 
workmen upon it at the outfet, it was now evident, that he 
had even deceived himfelf, by leaving too much to be done at 
the latter end. At length, however, the inftrument was pro- 
duced, and placed on the 31ft of July at the ftation near 
Hampton Poor-houfe, on the very fpot where, about thirty- 
five months before, the meafurement of the bafe had been 
compleated. 
By commencing an operation of this nature, at fo advanced 
a feafon of the year, it was fufficiently obvious, that only very 
faint hopes could be entertained of bringing it to a conclufion 
before the bad weather would fet in. But it being of much 
importance to get the triangles, which extend acrofs the 
3 Channel, 
