It is undoubtedly expedient to train aërial observers to make reconnaissance at high altitudes. This has been the method employed by Great Britain and France. During the present war we hear of the British and French machines flying at 6,000 feet, where they are fairly safe from gun-fire. The Germans often appear to fly considerably lower. This probably accounts for the loss of so many German machines from gun-fire. It has been stated that at the time of writing British aviators have already brought down seventeen machines. But there have been instances of the aëroplanes of the Allies also making reconnaissance at lower levels. One very remarkable case of an aviator persisting in his reconnoitring task in spite of the fire of the enemy has been reported in the daily papers. The French aviator, M. Poiret, who is in the Russian service, said that during the recent Russian-German fighting he reconnoitered over the enemy’s positions, with a captain of the General Staff as observer, at a height of 1,200 metres. He was for twenty minutes under rifle and shell fire. Ten bullets and two fragments of shell hit his aëroplane. Nevertheless, he retained his control of the machine. The captain was shot through the heel, the bullet coming out of his calf, notwithstanding which he continued taking notes. The aëroplane returned safely. In making reconnaissance over the enemy’s lines it is well for the aviator to be practised in the art of making vol-planés. On more than one occasion in the present war the engine has failed while the aviator has been flying over the enemy. A well-directed vol-plané has brought him down within friendly soil. This gliding by means of gravity without the motor working in times of peace may have been thought to be a foolhardy practice, merely done for the sake of sensation. But the sensation of a few years back is the necessity of to-day! The vol-plané has become one of the most useful features of aëroplaning. A machine that is fitted with wireless telegraphy equipment undoubtedly possesses a great advantage for reconnoitring. It is especially useful when a heavy attack on an enemy is in progress. By its means a continuous stream of intelligence can be supplied to headquarters. The French have been particularly active in the development of wireless messages from aëroplanes, and have devised extremely portable forms of apparatus. It will be of great interest to hear accurate information in regard to their practical use in the present war. Aëroplane reconnaissance in naval operations is almost equally as important as its use on land. This will be one of the principal uses of the hydroplane, which can either travel on the surface of water or rise in the air. In the present war two seaplanes were recorded as scouting near Antivari on September 8th, 1914. It is also said that the Germans gave information to the Heligoland forts by biplanes concerning the fight in Heligoland Bight.