No. of places No. of lb. of Description of motor. indicated on fuel consumed the cars, per Consumption per places mile run. of fuel. indicated per mile run. lb. Electric 80,203.5 14,786 0.18 Rowan 148,399.6 14,498 0.09 Wilkinson 119,085.1 22,000 0.18 Krauss 108,983.9 22,726 0.20 Compressed air 128,189.3 90,420 0.69 TABLE IV. Description of motor. No. of seats per No, of lb. of mile run. Consumption fuel consumed of fuel. per seat per mile run. lb. Electric 61,591.2 14,786 0.23 Rowan 135,928.8 14,498 0.10 Wilkinson 93,965.6 22,000 0.23 Krauss 86,039.9 22,726 0.25 Compressed air 132,732.7 90,420 0.66 As regards the figures in these tables, it is to be observed that the consumption of fuel for the electric car is, to a certain extent, an estimate; because the engine which furnished the electricity to the motor also supplied electricity for electric lights, as well as for an experimental electric motor which was running on the lines of tramway, but was not brought into competition. 20. Minimum consumption of oil, of grease, tallow, etc. (the same conditions as in No. 19). TABLE V. Total Consumption Total consumption of oil, tallow, Description of number of of etc., motor. miles run. oil, tallow, per train mile etc. run. lb. Electric 2,358.9 99.0 0.038 Rowan, steam 2,616.9 106.7 0.038 Krauss, steam 2,457.8 188.5 0.073 Wilkinson, steam 2,473.3 255.4 0.101 Compressed air 2,259.1 585.2 0.255 In addition to these considerations, it was thought useful to investigate the quantity of water consumed in the case of those engines which used steam. The experiments made on this point showed as the consumption of water: Gallons per mile. Rowan 0.75 Compressed air 1.06 Wilkinson 5.89 Krauss 6.52