430 M. de luc’s Barometrical Obfervations on 
It will be eafy to come at the elevation of Hanover 
above the level of the fea, in order to compleat this mea- 
furement: correfponding obfervations of the Barome- 
ter will be fufficient for that purpofe. In the mean time 
it is eafy to eftimate either by the Barometer itfelf (the 
mean height of which during the month of October was 
30,1 Englifh inches on afecond floor) or by the fmall decli- 
vity of the rivers between Hanover and the fea, that the ele- 
vation of Hanover above that level is not very confiderable. 
Such, sir, are the meft interefting obfervations of this 
kind which I have been able to make in the Hartz. It 
appears to me, that they are of a nature that fhould en- 
courage us to examine more and more into the phyfical 
principles on which they depend : principles, the exten- 
five confequences of which promife new fteps in our 
inveftigation of nature, not only upon our globe but alfo 
in the heavens. 
A Be- 
II fera aife de favoir la hauteur de Hanovre fur le niveau de la mer, pour 
ccmpletter cette mefure. Des obfervations correfpondantes du barometre, fuffi- 
ront pour cela. Mais en-, attendant, il.jeft.. aife de juger, foit par le barometre lui 
meme, dont la hauteur moyenne le matin, pendant le mois d’O&obre, fut 30,1 
pouces Anglois a un feconde etage-; foit par le peu de pente des rivieres jufques a 
la mer; que l’elevation de Hanovre au delfus defon niveau n’eft pas bien grande. 
Voila, monfieur, les obfervations les plus interelfantes de ce genre, que j’aie ' 
faites dans le Hartz. II me femble qu’elles font propres a donner le courage 
d’examiner de plus pres tous les principes phyhques fur lefquels elles fe fondent; 
principes, dont les confequences tres etetidues, nous promettent de nouveaux 
pas dans l’etude de la nature, non feulement fur la terre, mais dans le ciel. 
Defer iption 
