The infamous German bimotored pusher Gothas, measuring 78 feet, driven by six-cylinder Mercedes 260 horse-power engines, and carrying three men and five hundred pounds of explosives, flying by night from the aerodromes near Ghent, Belgium, a distance of nearly two hundred miles, have raided London more than a hundred times despite the opposition of fleets of British aeroplanes and seaplanes and thousands of antiaircraft guns. For some time aerial mail has been carried from London to Paris in two and a half hours. Mail is also being transported by air route regularly between Washington, Philadelphia, and New York, and between Rome and Turin. Mail was carried through the air from Chicago to New York in ten hours and five minutes; and Second Assistant Postmaster-General Praeger says the sky-line mail will be extended to the Pacific coast, and in the year 1919 fully fifty aero mail routes will be in operation. How many aeroplanes that might be used for peace purposes were completed by all the Allies and in service of some kind at the end of the war is problematic. Judging by the Allied demand that Germany surrender 1,700 aeroplanes, the Allied military authorities surely estimated that Germany must have had far more than that number in active service on the West Front. Counting the training-machines necessary to teach enough aviators to fly and the planes discarded as unsafe for battle flying, Germany must have had 8,000 or more heavier-than-air machines. The British surely had close to 5,000 of all kinds on the different fronts, with possibly 10,000 used for training and other purposes. Indeed, Britain was making over 4,000 a month, or 50,000 a year, when the war ended, according to the statement made by General Seely in Parliament in April, 1919. Perhaps the French and Italians combined did not have so many as the Germans because of the physical limitations on their manufacturing facilities. The Americans, we know, had nearly 2,000 on the front when the war ended. A thousand De Havilland 4’s had been delivered up to October 4, and more than 6,000 training-machines had also been constructed. We were just getting into a factory production of about 1,200 a month when the war ended. Indeed, to be exact, on November 11, 1918, a total of 33,384 planes had been ordered; subsequent to that date 19,628 ordered were cancelled, and up to December 27, 1918, a total of 13,241 planes had been shipped from United States factories. With the exception of the training-machines and the two-seater fighters, like the De Havilland 4’s, most of these American machines could hardly be used for anything except aero mail service. The large Caproni and Handley Page bombers will do some passenger carrying. Indeed, the peace planes, unlike the war planes, are constructed with stability, safety, capacity carrying, and comfort as the chief factors.