This ultra-modern battery of forty guns was a part of Canada’s contribution to the Empire at war. Fifteen of the guns were made possible by the patriotic generosity of Mr. J. C. Eaton, Toronto’s well known millionaire department store owner, and were designated as the Eaton Battery. They were completed right in Toronto, where both the experimenting and designing were carried on, and the cars and guns put together, under the supervision of Mr. W. K. McNaught, C.M.G., who undertook the task of directing the work for the government. The corps of officers and men who man the battery had a special course of training under Capt. W. J. Morrison at Exhibition Camp. It is only necessary to recall to mind certain pictures that have appeared recently of motor car machine guns in action to realize with what deadly effectiveness these weapons may be employed in present-day warfare. They combine all the terrific killing power of the rapid-fire machine gun with the swift mobility and tirelessness of the gasoline-driven motor car. Protected behind almost impregnable steel armor plate, the driver may dash ahead of the advancing lines and enable the gunner, almost completely protected, to mow down the ranks of the enemy with a sweeping stream of rifle bullets, played along a line of men much as one would play a stream of water from a fire hose. The car may be in motion all this time, or may stop only for an instant, so that the enemy has no time to train its artillery upon it. It may dash into what would be for infantry or cavalry or ordinary gunners the jaws of death, distribute its deadly sting, and then dash out again unscathed. Thus it may be of incalculable service in the field. Or it may be used in a town where whole masses of defenders may be driven back, and the streets completely cleared by the rapid sweep of its bullets. The armored motor car guns which were constructed in Toronto are built on a motor truck chassis. The wheels are made of pressed steel, and have heavy tires of solid rubber. All the rest of the car is effectively covered with Harveyized steel plates, which were severely tested. This armorplate was rolled in Canada by Canadian workmen, and was made from iron ore mined in Nova Scotia.