Himadrava Mounrains. 243 
them, being vitiated or doubtful. The accident was the falling of-a chair 
against the fixed pair, after the hmder pair, of rods had been removed.s>-As 
they suffered some shock and'were certainly moved a’ little, I retiirned tb 
the picket, last passed and continued regularly the -measurement from it, 
One of the omissions was the forgetting to read the languette of a pair of 
rods. Inconsequence of which I also thought it necessary to return -to the 
last passed picket. The other omission ‘was of less ‘Consequence, 2 ‘The 
quantity which had been omitted to be registered, was that ‘by which the 
plummet had been placed in advance of the rods, in marking the’ point, 
where the day ’s work concluded. As this quantity seldom exceeded + - of an 
‘inch, the plummet being always placed as close : as could well be to the rod, 
it was not thought that | a doubt of such a , quantity on a base of four miles, 
was a sufficient reason to undertake so troublesome a task as the remed- 
surement of 400 feet would have proved. 
24, Donwe the measurement, one pair vot ous Coe eat fron the 
outside of the piece of wood), had warped considerably i inconsequence et 
which I was for ced to straighten them i in the following manner: ck 
JAS 
Txe-small piece a b cd was cut out. at. the bend, and, another, some- 
thing larger. driven in, and this expedient proved a, perfect cure, for the 
warping, rendering this pair of rods equally straight with.the other. F earful, 
however that such an operation might. have some effect on ;their length. 
VOL. XIV. 3Q 
