Index 327 



Weighing-machine, 60 Work, British unit of, 119 



Weight a measure of mass, 48 Work done against force, 120 ; by 

 Weight, British standard unit, 52 ; force, 119 



causes of variation of, 47; Work, measurement of, 118; Me- 



definition of, 46; Metric stan- trie unit of, 119 



dard unit of, 53; actual, 95; Worm-condenser, 269 



relation between mass and, 46, 



volume and, 63 Yard, legal, 2; multiples of, 2; 

 Weights, British system, 53; submultiples of, 2- 



equality of, 47; Metric table 



of, 53 ; usual contents of box Zero, use before fractions of units, 



of, 54 12 



Wet and dry bulb hygrometer, 237 Zinc chloride, preparation of, 286 

 White lead, 316 



CAMBRIDGE: PRINTED BY JOHN CLAY, M.A. AT THE UNIVERSITY PRESS 



