SCIENTIFIC NEWS. 259 



Log. tan. (24°. 46'. +) 9.6642136 



Correspondent log. sine, which sub-"^ 



tract from above half -sum 



6222790 



Diff.==log. sin. 45°. l'. 15". 1 5. half \ 



.u . A' . 1 ^ r 9.8496430 



the true distance, as betore J 



The advantages of the preceding modes of reduction Advantages of 

 are, that they are not difficult in practice, that they are *^ ^" "* 

 perfectly correct, that they may be applied without 

 using any but the common tables, that they are not in- 

 cumbered with any complex distinction of cases, and that 

 their results are void of ambiguity. 



IGthDec. IS05. Q. 



SCIENTIFIC NEWS, 



National Institute of France, 

 The Class of Mathematical and Physical Sciences of j^ational Insti- 

 the National Institute of France held its public session on tute ef France, 

 the 7th of July last. The order of the readings was as J"*^ ^' ^^°^' 

 follows : ' 



1 . The mathematical prize proposed for the month of 

 January 1809 was announced. 



2. A notice of the proceedings of the Class, from the 

 1st Messidor in the year XIII. to the 1st July 1806, 

 philosophical department, was read by M. Cuvier, the 

 perpetual secretary. 



% A like notice of the mathematical part of the Class 

 during the same interval was read by M. Delambre, per- 

 petual secretary. 



4. A memoir on the affi^nities of bodies for light, by 

 M.Biot. 



5. A memoir on the adhesion of the particles of water 

 to eaeh other. By the Count of Rumford, foreign asso- 

 ciate. 



6. IJistorical Uulogium on M. Cells. By C. Cuvier. 



The 



