30 



C. PIAZZI SMYTH ON 



APPENDIX III. 



I. Numerical Tables of Hourly Observations of Temperature, Depression of "Wet-bulb, and 

 Hygrometrical Deductions for 



Aberdeen, 

 Glasgow, and 

 Greenwich. 



II. Plates X. to XIV. of Graphical Projections of the preceding Hourly Observations, viz. :- 



Plate X. Temperature Curve at Aberdeen. 

 Do. Glasgow. 



Do. Greenwich. 



Plate XL Depression of "Wet-bulb Therm, at Aberdeen. 



Do. do. Glasgow. 



Do. do. Greenwich. 



Plate XII. Weight of Vapour in 1 cubic foot of Air at Aberdeen. 



Do. do. Glasgow. 



Do. do. Greenwich. 



Plate XIII. Vapour required to saturate 1 cubic foot of ah' at Aberdeen. 



Do. do. Glasgow. 



Do. do. Greenwich. 



Plate XIV. Humidity Curve at 

 Do. 

 Do. 



Aberdeen. 



Glasgow. 



Greenwich. 



