INDEX. 167 



PAGE 



Gas producers - 



pump - Io6 



Gauge depth - - 140 



flow-over " 5 2 



formulae for 53 



for streams - 5 1 



Gauging streams - 4& 



Good water, qualities of - 5 



Gradient, hydraulic - - 61 



Gravel, water from - - 20 

 Gravitating mains 



Guttermuth pump- valves - 81 



H 



Hand pump - 66 



Hardness in water - ~ 4'5 

 Hatfield pump 



Hawkesly's formula - 53 



"Head" 6 4 



Hill-side reservoir - -13 



Hook gauge - 5 2 



Horse pump - "7 



power of gas engines - 9 2 



House, water system for - - T 5 2 



Humphrey pump - - 106 



Hydraulic gradient - - 61 



mean depth - 57 



ram - 68 



arrangement of 7 2 



formula for - - 6 9 



loss of efficiency - 74 



power to work - 7 1 



snifting valve - 73 



Hydrogen sulphide in water - - n 



