Viii TABLE OF CONTENTS. 



BAROMETRICAL TA^hliS.— Continued. 

 Tablk 



Determination of heights by the barometer — English measures. 



20 Values of 60368 [i +0.0010195x36] log ^^^ 100 



21 Term for temperature jq. 



22 Correction for latitude and weight of mercury 106 



23 Correction for an average degree of humidity 108 



24 Correction for the variation of gravity with altitude ... 109 

 Determination of heights by the barometer — Metric measures. 



25 Values of 18400 log ^^° ^^^ 



26 Term for temperature j j ^ 



27 Correction for humidity ^ ^ 2 



28 Correction for latitude and weight of mercury 114 



29 Correction for the variation of gravity with altitude . . . 115 



30 Difference of height corresponding to a change of o. i inch in the 



barometer — English measures ii5 



3 1 Difference of height corresponding to a change of i millimetre in 



the barometer — Metric measures 117 



Determination of heights by the barometer. 



32 Formula of Babinet jjg 



Barometric pressures corresponding to the temperature of the 

 boiling point of water — 



33 English measures jjo 



34 Metric measures jjq 



HYGROMETRICAL TABLES. 



Pressure of aqueous vapor {Brock) — 

 35 English measures j22 



3fi 1 



> Metric measures . . / 128 



^'^ I 142 



37 Pressure of aqueous vapor at low temperatures (C. F. Marvin)— 



English and Metric measures 130 



38 Weight of aqueous vapor in a cubic foot of saturated air— 



English measures 1^2 



39 Weight of aqueous vapor in a cubic metre of saturated air- 



Metric measures I,, 



Reduction of psychrometric observations— English measures. 



40 Pressure of aqueous vapor 134 



41 Values of 0.000367 ^(/-z) (^ I +'^Z1^'') 1^6 



V 1571^ .... o 



42 Relative humidity— Temperature Fahrenheit 138 



