 |
 |
|
 |
|
 |
58 (LVIII) — 1947-1948
Hague Fuel Economy Conference, 90, 127.
Hardy-Simplex Air Drill, 238.
Harrington No. 10 Colliery Explosion, 144.
Headgear Pulley, 24.
Heat, Mechanical Equivalent of, 71.
Holman Roto Auger Driller, 122.
Hoppit, Capacity of, 130.
Horse-power of Motor, 262.
Hot Wire Ammeter, 110.
Humphrys, Major H. J., Presentation to, 252.
Huwood 50-cycle Electric Drill, 138, 251.
Huwood Loader, 112, 239, 258.
Huwood, C.A., Rotary Drill, 227.
Hydraulic Packing, 11.
Hydrometers, 57.
Hygrometer, 250.
Contains public sector information licensed under the 
