Naturally human ingenuity was called into play to protect men against the poisons and the gas mask came into being. These were of many types. The early creations consisted primarily of a nose and mouth covering with a receptacle for inclosing a sponge or gauze soaked with a chemical which possessed the power to neutralize the gas fumes. Such devices have been used by fire fighters in large cities the world over where the men battling to save buildings have been compelled to enter smoke-filled rooms and cellars. Other types which have proven more effective are designed after the fashion of the diving apparatus, and having a small tank of compressed oxygen with feeding tubes running to the mask. The oxygen combines with the contaminated air breathed through absorbent cotton or sponge and provides the wearer with the proportion of oxygen necessary to existence. And even the horses have been provided with such masks.
But to go back to bombs. All through France and Belgium, and wherever the Prussian soldiers found their way, there was evidence of the use of hand grenades which were thrown against the sides of or into buildings to set them in flames. Some of these devices, made of sheet metal, were in their action similar to the "Fourth of July torpedoes" familiar to every American school boy. When thrown they exploded throwing oil and chemicals over walls and floors. Some of them seem to have been loaded with bullets and were in effect hand shrapnel.
Then there developed from the primary use of these nefarious weapons the recognized hand grenade, which is actually hand-shrapnel, plied by men at close quarters. Thousands of these have been thrown by the armies in their charges on the trenches. And then, to offset the use of these devices in the offensive, there came into being also the smoke bombs. These when exploding throw up great clouds of black smoke which hang over everything.
EFFECTIVE IN A HUNDRED WAYS.
The use of such bombs has proved effective in a hundred ways. They have been used to create a perfect shield of smoke to conceal the movements of troops, or prevent the enemy from finding the range with their long distance guns. Similarly bombs which contained burning chemicals have been used to hold in check the approaching enemy forces.
Half way between the great gun and the hand grenade stand among war weapons the trench mortars. The first of these were used by the Japanese in their war with Russia. The Japanese mortars were mere logs hollowed out and strengthened by wrappings of bamboo rope. The projectiles fired from these were empty provision tins filled with high explosives, scraps of metal, bits of stone or whatever, in the emergency, could be found to fill them.
The mortars are pitched at an angle and the projectiles are shot with a skyrocket effect, to land in the trenches or camp of the enemy. The Germans developed the idea and the perfected mortars are of steel, and capable of throwing bombs weighing several hundred pounds.
And then the great moving fort which has been called "the tank!" Those snorting, fire-spitting dragons which were depicted for us in childhood can scarcely bring to our mind a greater element of the fanciful, the horrible, and the powerful than the steel hulks which came into being in this war under the name of "tanks."
We see them in our mind's eye spitting fire as they crossed No Man's Land, amid the smoke and dust of bursting shells. Keeping steadily on their courses they dived into huge craters made by exploding shells; stretched themselves across trenches, brushed trees and boulders aside, and kept steadily on their courses. German wire entanglements were as so many pieces of string before their huge frames. Nothing deterred them. They moved forward into the face of the enemy, reaching the first line of German trenches. There the soulless devices sat complacently astride the trenches, and turning their guns along the ditches swept them in both directions.