the Depth of the Mines in the Hartz. 447 
By the above mentioned obfervations of Mr. de ley- 
ser’s, and by the comparifon between his barometer 
and mine, 1 have reafon to conjecture, that at the time of 
the mean obfervation of the barometer at Oder-brucke, 
In. L. 1 6th of Lines. Log. 
it flood at Claufthal at, 26 4 3 = 5059 37040,647 
Mean height ob-'i , 
ferved at Oder-brucke, j ^ 3-4947 3 943 > 4 I 9 
Difference, — - 
The mean heat of the air muft have been a 
little greater than at Oder-brucke ; I compute • 
it at -30, confequently to deduct, 
97,228 
5 ? -834 
Height of Oder-brucke over the firft floor ^ 
of Mr. DE leyser’s houfe at Claufthal, or 
what comes to the fame nearly, above the firft- 
floor of the Crown Inn, where I lodged, - 
f- 91,394 
The 
Par les obfervations ci-deffus de M. leyser, etpar la comparaifon faite de fon 
barometre avec le mien, j’ai lieu de conjedturer, que lors de 1’ obfervation moyenne 
P. L. ibde big. Log. 
du barometre a Oder-brucke, il etoit a Claufthal, 26 4 3 “5059 37040,647 
Hauteur moyenne obfervee a Oder-brucke, 25 9 30=4947 36943,419 
Difference, — 97 ? 
La. chaleur moyenne de Fair devoit etre.un.peu plus grande 
Oder-brucke 0 Je la fuppole a — 303 done 
60 
1000 
qu 
dec! u ire. 
} 5,834 
Hauteur d’Oder-brucke fur le premier etage de la rnailbn de o'! 
LEYSER a Claufthal, ou, ce qui revient -a peu pres au meme, fdr ie > 91.394 
; premier etage de Fauberge de la Couronne ou j’etois ioge, *■' 
