HINTS TO TRAVELLERS. 
216 
(.Example 2.) 
The Lower Station is in Lat. 30 0 , 489c ft. above sea-level. 
Upper Station, 
o 
Thermometer in open air. 32 
Thermometer in barometer. 35 
Inches. 
Barometer .. . 15 • 76 
Part I gives f for 25inches 
rari 1. gives | for I5 ., 6 inches 
Lower Station. 
o 
89 
89 
Inches. 
25-07 
22919-3 
10791-3 
Difference.. 12128 
Part If. gives fer 89° — 35 0 . —126 
Approximate abilude . 12001 
12001,6 X (89° + 32 0 - 64°) = 13 • 3 X 57 . = +758 
900 -- 
Nearly correct altitude . 12759 
Height of Lower Station. 4890 
17649 
From Part III. . 4-22 
From Part IV. . +56 
From Part V. . +7 
Altitude above the sea-level . 177*4 
For high elevations it is needless to pay attention to decimals. 
