TRANSACTIONS OF THE SECTIONS. 



51 



that, for all practical purposes, the tables quoted above are quite accurate enough, 

 though for great heights, they contain an error ; the correction to be applied is 

 small, and additive. The instruments with which Messrs. de Schlagintweit made 

 their observations, were expressly made for the purpose ; they ranged from 100° Cels. 

 to 78° Cels., but had a length of 1 foot 9 inches, so that it was possible to divide 

 each degree into fifty parts directly. M. de Schlagintweit drew attention to the 

 accuracy of the results obtainable by these delicate thermo-barometers, which, as 

 far as his experience goes, he considered to be quite comparable to the barometer, if 

 used with all the necessary precautions, though for daily variations the barometer 

 is preferable on account of the greater facility of reading. The circumstance that 

 the thermo-barometer is much less liable to get out of order, makes it a most valu- 

 able instrument for travellers. 



Messrs. de Schlagintweit's Comparison of Boiling-points. 



Name of the place of 

 observation. 



Year and Date. 



Thermo- 

 barometer 



readings, 

 C. degrees. 



Simultaneous baro- 

 metric readings. 



Milli- 

 metres. 



Millims. 

 reduced to 



boiling- 

 point, 

 C. degrees. 



Correction 



in 

 C. degrees. 



Group 1.-100° to 9G° : Correction -0°09 of the Thermo-barometer*. 



Suni 



Keterbal 



Petolia ' 



Okimath 



Okimath 



Group II.— 



Thosimath 



Pandukeser 



Thosimath 



Gaurikund 



Gaurikund 



Gaurikund 



Giunali 



Simla 



Trichiigi Narain.. 



Group III. 



Minasaura 



Badrinath 



Badrinath 



Badrinath 



Mi'ingu Pass 



Mana 



1856, April 7 .. 

 1855, Sept. 12 

 1855, Sept. 12 

 1855, Sept. 15 

 1855, Sept. 16 



Group IV.- 



Kidarnath 



Kidarnath 



Shemkarik 



Laptel 



Loanka 



Group V.- 



Jhi Gamin 



Janti Pass 



Janti Pass 



Jbi Gamin Pass . 



■95-99 to 94 : Correction -0°-10 of the Thermo-barometer. 

 1855, Sept. 9 .... 

 1855, Sept. 8 .... 

 1855, Sept. 9 .... 

 1855, Sept. 24 . 

 1855, Sept. 23 . 

 1855, Sept. 19 . 



1855, Sept. 29 . 



1856, April 12 . 

 1855, Sept. 24 . 



-93-99 to 92: Correction -0°- 11 of the Thermo-barometer 

 1855, Sept. 28 , 

 1855, Sept. 7 ... 

 1855, Sept. 5 ,.., 

 1855, Sept. 6 .... 

 1855, Sept. 26 , 

 1855, Aug. 28.... 



-91-99 to 90 : Correction -0°- 12 of the Thermo-barometer, 

 1855, Sept. 20 .. . 

 1855, Sept. 20 .... 



1855, June 11 



1855, June 14 



1855, July 7 



-89-99 to 81 : Correction 



1856, Aug. 16 



1855, July 10 



1855, July 9 



1855, Aug. 18 



-009 

 -009 

 -007 

 -004 

 -009 



007 

 ■ 010 

 014 

 Oil 

 -015 

 -0 07 

 -018 

 -012 

 -010 



-014 

 -0 10 

 -012 

 -011 

 -014 

 -0-16 



-007 

 -008 

 -017 

 -017 

 -014 



-0°-13 of the Thermo-barometer. 



-0-17 

 -013 

 -0 09 

 -014 



* The corrections of the thermo-barometer, given at the different groups, are values 

 obtained by fundamental determinations. These determinations will be given in detail in 

 vol. ii. of Messrs. de Schlagintweit's ' India and High Asia,' 1861. 



4.* 



