Jg5_ SCIENTIFIC NEWS. 



thore which M, Delambre made for the great raeridian ; an(I 

 thediftance from Dunkirk to Montreal has been taken for the ' 

 firft bafe. When the triangles are finifiied, a bafe wiil be 

 meafured towards the north, to ferve for the verification of 

 the work. The Batavian republic have entrufted the direc- 

 tion of this map to Colonel KrayenhofF. 



Chart of the Some months ago there appeared at Peter fburgh a very fine 



White Sea, by hydrographical cl)art of the White Sea, of which General 

 tauzoff Kautouzoff is the author: Many naval officers have worked 



under his dire6tion for four years, in collecting the materials 

 nece.Tary to compofe this chart. The eoafts of the White Sea, 

 of its gulphs, and of a part of the Northern Ocean, have been 

 laid down trigonometrically. The deplhs have been carefully 

 founded ; and fix of the principal points of the coaft have beers 

 •determined by afi:ronomical obfervalions. 



ia relief. 



M. Lartigue*s ^^' Lartigue having been engaged for thirty years in con- 

 map of America Jtruding, at the marine depot (of Paris), a larre and beautiful 

 map of America in relief, has at length completed it. It is 

 faid that the mountains, and the iflands, and the tints of the 

 fea, are all exhibited in a manner moft capable of interefting 

 thofe who make geography their ftudj. 



Exptdltion of Several months ago. Captain Lewis, in j^merica, under- 

 Capt. Lewis up took to afccnd the river MilFouri, in fearch of a paflage to the 

 South Sea. Very interefting intelligence may be foon ex- 

 pected from this expedition. 



the Miffouri. 



Sttfvev of ^^^ work of the government furvey, or cadajire, of France, 



France. has proceeded with adivity ; 2000 perfons are employed in it 



in the 108 departments. 



Effe6l of Heat on Magnetifm. 



Ma n t f a - ^^' C^"^^'^^ ^^^^ piiblifhed an inlerefiing memoir on the 

 ftroyedatyoo* eftedf of heat on raagnfetifm. At 200 degrees of heat, two- 

 of heat. fifihs of It are dcllroyed, and the whole at 700 degr^qs. 



