354 



INDEX. 



winds, 56 ; origin of, 57, 58 ; in 



cyclones, 58 

 Winkelmann, heat conductivity of air, 



107 ; on latent heat of steam, 180 

 Wood, heat conductivity of, 89, 90, 



103 



Wool, conductivity of, 91, 103 

 Work, as a measure of temperature, 9 ; 



relation of heat to, 9, 258 et teq. ; 



work scale, 259 et seq. 

 Worthington, on expansion of alcohol 



under a pull, 187 



Wroblewski, on liquefaction of gases, 

 197 



YOUNG, on critical constants, 192. 

 also Ramsay and Young. 



See 



ZEBO point of thermometer scales, 4, 7 ; 



absolute, of temperature, 10, 12 

 Zinc, melting-point, 12 ; specific heat of, 



81, 87 ; atomic weight, 87 ; atomic 



heat, 87 ; heat conductivity of, 100 ; 



electric conductivity of, 100 



THE 



Printed by BALLANTYNE, HANSON &* Co. 

 Edinburgh <5r* London 



