Himataya Mountains, « Boy 
Wuen the temperature had sunk to 58-0 as shewn by the four thermo- 
meters, it was found that it had contracted -097.., . 
Now, 0075 x 11:3 = -083 
Observed, 097 
“012 Error. 
Again the registers being set when the temperature was 57°9, it was 
found next morning to have contracted °1625 inch, The temperature 
had fallen to 38-3. , 
Now, 57 — 9 — 38:3 =19°6 and 0075 x 19°6 = “147 
| Observed, “162 
O15 Error. 
40. Tue registers being now firmly fixed and the chainstretched with 
the small weight, it was proposed by means of it, to determine the distance 
of them. For'this purpose the quantity which the chain exceeded, or fell 
_ short of them, with the temperature as given by the four thermometers, 
ae noticed from time to time. ‘The chain is said in Mr. Troventon’s © 
letter, to have been exactly 100 feet in the temperature of 55. It was 
therefore reduced to this temperature. The following table, will shew the 
result: : 
Mean of 4 Thermometers, Reduction to 55, Pfergnee afichnin. anit above 100 feet. 
662 x 084 — 015 069 
382 — +196 — 172 046 
385 — 7124 — ‘191 “067 
3o1 — 125 — -180 055 
069 
