of a New Hygrometer. 



101 



was very different in each experiment, which will also prove 

 that no barometrical corrections will be required in ascer- 

 taining the Dew-point. 



Experiment 1st. 



Barometer 29*5 inches. 



Temperature of the shade 57 correction 



Temperature of wet bulb 54 difference 3 + -5x2=7 abso- 

 lute dryness on the thermometric scale. 



Temperature of the shade 57—7=50° Dew-point. 



Temperature of the shade 57-— 3*5 =53*5 lowest limits of 

 refrigeration corresponding to a tension of -42067. 



Ascertained Dew-point 50°. 



3-37438 



= -42179 mean tension. 

 'AO(\an $ tension corresponding 

 ^"^^^^ I to 53°.5. 



Difference 



•00112 



Experiment 2nd. 



Barometer 28-4 inches. 

 Temperature of the shade 51*0 correction 



Temperature of wet bulb 47-5 diff. 3^5 + 583x 2=8-166 



absolute dryness on the thermometric scale. 

 Temperature of the shade 51 — 8-166=42-834 Dew-point. 

 Temperature of the shade 51—4-083=46*917 lowest limits 



of refrigeration corresponding to a tension of -33630. 

 Ascertained Dew-point 42° Fahrenheit. 



