[ 378 ] 
by meafuring the whole Length of Frances and 134 
lefs than that of Mr. Picardy fo highly approved of 
by Mr. CaJJinh as confirming his own. 
The Reflexions Mr. Celltus makes upon the Obfer- 
•vationsy &c. taken in the South Parts of France^ 
be referred to another Meeting. 
^he Continuation of the Remavks made hy 
Mr. Celfius on the Ohfer^ations taken in 
France, in order to afcertain the true Fi^ 
gure of the Earth. 
M r.. Celfius having finifhed his Remarks upon 
the Obfervations made in the North Part of 
Francey extending from Paris to P^unkirky proceeds 
to examine thofe taken in the South, from Paris to 
Colliourey near the Borders of SpaiUy and the Pyre- 
nean Mountains. By the former, a mean Degree 
was found to confft of 5T<5,96 o Toifes, by the latter 
57,097; and confequently the Earth is an oblong 
Spheroid. 
Mr. CelfluSy in examining thefe Obfervations, 
which were taken under the Condud and Diredion 
of the late M. Caffmi in 1700, firft confiders the 
Strudure and Goodnefs of the Inftruments ufed; then 
the Accuracy of the Aftronomical Obfervations for 
finding the Difference of Latitude ; and, in the laft 
place, the Trigonometrical Operations for deter- 
mining^ the Diftances of Places ; efpecially the two 
Extremes under the fame Meridian, 
The 
