tORTABLE BAROMETXR. 



Difference, 42 tenths. 



Value of a te^th by ^^bie, 95.5 feet. 



1910 

 3820 



Approximate height, 4011.0 feet» 



Do. by Sir G. Shuckburg, 4016.0 



Error, — 5 feet. 



CORRECTION^ FOR TEMPERATURE. 



For 8° == 2 hundredths, 80 feet, 



Fur 3'' == 3 four hundredths, 30 



Correction, + 1 10 

 Do. by Sir G. Shuckburg, 107.4 



Approximate Height 



Correction for Temper. 

 Kesult, — ^ 



EXAMPLE II. 



Obsen'ation at bottom, 30.017 Therm, in air, 60* 

 Observation at top, 29.534 Therm, in air, 57 



2 

 INIean, 

 Difteijence^ 



EiTor, 



; by me. 



4011 



)er. 110 



+ 2.6 



Sir G. Shuckburg. 

 4016 

 107.4 



— 4121 



4123.4 



Value of a tenth by table, 



Approximate Height, 422.625 



Do. by Sir G. Shuckburg, 422.9 



Error, — 00.3 

 Vol. XIV.-Mat, I8O6. 



59.551 2 

 29.775 Mean, 

 4.83 Standard, 



28.S 

 32. 



Difference, 



87.5 



26.5 



350.0 





70.00 

 2.625 





