[ so r J 
EXAMPLE. 
Barometer. 
T r . 
in. 
Diff. T r . 
| out. 
Tempe- 
r ature of 
air. 
£ 
Lower 29 68 
Upper 25,2b 
+ 57 
+43 
'4 V 7 
* + 4 -' 
+ 4 lf 
Diff. of Thermometers in 
= 14 ° = 10 + 4 ° 
io° gives 4,5 19 
4 0 gives 1,808 
6,32.7 
Log. of lower B r . 
of upper. 
H 7 2 4 6 39 
14027771 
Equation for $ 
Diff. 
IOOO 
Equation for g 
Approximate height 
Equation for air N -f « 
Eleight correft 
696,86c 
— 6,327 
690,541 
+ H>? 
7 ° 5»°4 
Temperature of air = 49^ ~ 40° -4- 9 
N = -4- o 
9 0 X 600 fathom gives 1 2 
9 ° 
X 
9 ° 
i,8 
L 
i 
X 
600 
0,6 
1 
2 
X 
9 .a 
0,1 
* = r 4>5 
N 4 - n — 14,? 
by little table 
for air. 
EXAMPLE IL. 
Barometer. 
T r . 
in. 
Diff. 
r-pr 
out. 
Tempe- 
rature of 
air. 
Diff. of T rs . in ~ 3 0 gives equation for g 1,356. 
Temperature of air — 33 0 — 30 ° -j- 3 0 . 
30° upon 300 fathom gives 6,683-) by great ta- 
upon 90 2,005 > ble for air. 
upon 6 0,1344 fign — 
N — 85822 
Lower 29,45 
Uppere6,82 
+3 8 
+ 4 1 
3 
+ 3 1 
+35 
33 
Log. of lower 1.4690853 
of upper 1.4295900 
Diff. 
394,945 
1000 
Equation for g + 1,356 
Approximate height 596,301 
Equation for Air — N< — n. — 6,182 
Height cori eft 390,119 
3 ° 4 give, ,, coo b] 
x 90 o,6» 1 r for air _ 
X O 0,04 J 
n = 2,640 
N — n — .6, 1 82 
XXXI. A 
