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 proved more than this, unfortunately. It was seen that a miscalculation had been made with respect to the site of the aerodrome itself. In the navigation of the air, where all is new, such surprises meet the experimenter at every turn. This ought to be remembered when one takes account of progress. In the Paris-Madrid automobile race of 1903 what minute precautions were not taken to secure the competitors against the perils of quick turnings and grade crossings? And yet how notably insufficient did they not turn out to be. As the air-ship was being taken out from its house for its first flight on the morning of 29th January 1902 the spectators could see that nothing equivalent to the landing-stages which the air-ships of the future must have built for them existed in front of the building. The air-ship, loaded with ballast until it was a trifle heavier than the surrounding atmosphere, had to be towed, or helped, out of the aerodrome and across the Boulevard de la Condamine before it could be launched into the air over the sea wall. Now that sea wall proved to be a dangerous obstruction. From the side walk it was only waist high, but on the other side of it the surf