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THROUGH FINLAND. 385
* ftation, the elevation or depreffion of the other fignals in rela-
“‘ tion to their horizon. I meafured all thofe angles, and what
‘* furprifed me a good deal was, that I found them always a little
«* larger than they have been determined in the figure of the earth.
« The inftrument I employed in my operation was a whole circlé
“‘ of fourteen inches and two-thirds diameter, graduated at each
<¢ minute: nevertheleis, I believe, that by the help of an eftimate,
“* one may affure himfelf that he is not deceived by more than
“‘ ten, or at moft fifteen feconds. A complete defcription of this
“‘inftrument may be feen in the memoirs of the academy of
“ fciences, at Stockholm, for the year 1750, 26th and following
“pages. The firft fufpicion that ftruck my mind, upon obfery-
“¢ ing this difference, was, that it might arife from the point zero
“in that circle. This I examined on the fpot, and found it wrong
«© 1°30’. I continued the fame examination for feveral fucceflive
“« days after I got to Tornea; and taking the mean of my obfer-
“¢ vations on terreftrial objects, as well as meridian heights of the
«fun, I obferved that 1’ 24” ought to be deducted from all the
“* obfervations of heights, a circumftance which at the fame time
*« proves that the inftrument had fuffered no injury in travelling.
“ Individuals will make what remarks they pleafe on my obfer-
“‘ vations; I here fubjoin them exactly as they were made.
Vot. I. 3D Place
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