Dutton: New York, 1925. (Kegan Paul: London, 1925)
Chemical warfare had been so far foreseen by statesmen that in 1907 the signatories of the Hague Conference agreed to renounce the use of projectiles the sole object of which was the diffusion of asphyxiating or harmful gases. They were thus debarred from using lachrymatory gas, the most humane weapon ever invented; but permitted to discharge gas from cylinders on the ground, an exceedingly cruel practice. This regulation was well meant, but the path to August, 1914, was paved with good intentions.