1858.] Meteorological Observations on Pari snath Hill. 



15 



second summit 4468.7 feet above Calcutta, or 9 feet higher than the 

 trigonometrical station. This can hardly differ much more than 

 about 10 feet from the real height. 



Beat Mean Temperatures.* — The real hourly mean temperatures 

 of the stratum of air between the two stations, are found, by intro- 

 ducing into the Barometrical formula the known value of the height 

 (H.) and the observed Barometrical pressure (b, b 1 ). The shape of 

 the equation will be this — 



b 



where t + t 1 stands for the sum of the temperatures of both stations. 

 H, c and a are constant quantities for all hours. An error of 10 feet 

 in the height of the temple (4039.3 feet) would cause a difference of 

 about 0°.7 in the temperature of each hour, but it would not alter 

 the character of the curve or the magnitude of the variation. The 

 following table contains in the second column under each day, the 

 real mean temperatures as obtained by the formula : — 

 Table V. — Real Mean Temperatures. 



t -}- t J = num { Log H — c — Log \ Log 



— 2a 





1st April. 



3rd April. 



4th April. 



2nd April. 





'■d . 





ri 





t5 



CD 



-d 



r3 . 



0> 02 





T3 . 



*& 



s 



> s 



V) i_L 





M Si 



J cS si 



V) i_j 









p— ^ i— 1 

 a 







H 



o 





O 



o 



a 



o 



o 



O 



o 



c3 



6 



23.6 



25.6 





23.6 







23.2 



25.2 







7 



23.9 



25.3 





. . 







24.1 



25.2 







8 



25.2 



25.9 



1 9 



25.1 



26.5 



26.2 



25.0 



25.5 







9 



26.1 



26.7 



m , 



27 



26 4 





27.4 



26.1 



27.0 



25.9** 



10 



27-7 



27.3 



, . 



28.8 



26.5* 



26.7 







28.0 



26.9** 



11 



28.9 



28.1 





30.1 



27-0 



27.1 











12 



30.1 



28.1 



28.5 



30.9 



277 



27.6 











1 



31.3 



29.7 



29.2 



32.1 



28.1 



. , 











2 



32.3 



29.4 





33 



2S.4 













3 



32.0 



29.0 



. . 



33.0 



27.9 



28 











4 



31.7 



28.1 



. . 



32.5 



27.4 



27.6 











5 



30.9 



. . 



, , 



31.3 



27.5 



27 4 







31.2 



28.8 



6 



29.0 



. . 



, , 



29.4 



27.3 









29.5 



28.6 



7 



28.0 



.. 



.. 



28.6 



27.4 



27.1 











8 



27.3 



. . 



• • 



27.6 



27.0 



. . 







9 









26.9 



26.7 





* 10 h. 10 



** 9 h. 15 m. 



10 



26.3 





•• 



26.9 



26.7 





m. 



10 h. 15 m. 



* A. and H. Schlagintwcit, Neue Untersuchungcn, 

 Page 409. 



&e. &o. Leipzig 1851. 



