Higher efficiencies also cheapen electricity charges and benefit the environment.
The corresponding boiler efficiencies are given in the third column of the table, when they are known, and the combined efficiencies in the fourth column.
Tests of the comparative efficiencies of hydraulic and electric cranes tend to show that, although they do not vary to any very considerable extent with full load, yet the efficiency of the hydraulic crane falls away very much more rapidly than that of the electric crane when working on smaller loads.
- The combined engine and boiler efficiency has hitherto been taken to be o 06; actual values of the boiler efficiencies are given in Table XX.
avalanche photodiode arrays have efficiencies  limited by their surface dead layer.