(1) The aeroplane must carry two persons with seats located to permit of the largest possible field of observation for both. (2) The control must be capable of use by either operator from either seat. (3) The machine must be able to ascend at least 2000 feet in ten minutes while carrying a weight of 600 lbs. including the aviator and passenger, 150 lbs. of gasoline, and extra weight to make 600 lbs. All of the extra weight must be carried on the engine section and not distributed over the wings. (4) The fuel and oil capacity must be sufficient for at least four hours continuous flight. This will be determined by a trial flight of at least one half-hour, measuring the consumption of gasoline while carrying the passenger and weight stated in paragraph 3. (5) Same as No. 4 above. (6) Same as No. 5 above. (7) The engine must be of American manufacture and capable of throttling to run at reduced speed. (8) Same as No. 7 above. This test will be made with aviator and passenger, extra weight and fuel enumerated in paragraphs 3 and 4. (9) The aeroplane must develop a speed in the air of at least forty miles an hour. This test will be made with aviator and passenger, extra weight and fuel enumerated in paragraphs 3 and 4. The maximum speed must not exceed sixty-five miles per hour. (10) Same as No. 9 above. This test will be made with aviator, passenger, extra weight and fuel enumerated in paragraphs 3 and 4. (11) Same as No. 10 above. (12) Same as No. 11 above. (13) Same as No. 12 above. In ~1913~ additional requirements specified enclosed body, bullet-proof armour, .75 chrome steel, for engine and aviator, provision of necessary instruments and wireless, with, as desirable features, silencer and cut-out, self-starter and an efficient stabilising device. At end of March, 1913, the effective Army aeroplanes consisted of three 50 h.p. _Wrights_, one _Wright-Burgess_, several old machines. The Navy had two _Wright-Burgess_ hydros and a few nondescripts. A _Burgess_ flying boat since added. The estimate for Army effectives at end of the present year (1913) is 21 (5 _Burgess_, 6 _Curtiss_, 10 _Wright_). ~AVIATORS.~ (The numbers after any name is the number of the U. S. Aero Club certificate.) Army. Arnold, Lieut. H. H. (29) Beck, P. Capt. (39) Brereton, Lt. L. H. (211) Burge, Corp. V. S. (154) Chandler, C. de F. Capt. (59) Foulois, Lieut. (140) Geiger, Lieut. H. (166) Goodier, Lt. L. E. (200) Graham, Lieut. H. (152) Hennessy, Capt. F. B. (153) Humphreys, Lieut. Kirtland, Lieut. R.C. (45) Lahm, Lieut. F. P. (2) Love, Lieut. M. L. (155) McClaskey, Lieut. J. W. (90) McKay, Capt. G. W. (67) McLeary, Lieut. S. H. (210) McManus, Lieut. Milling, Lieut. (30) Rodgers, J. Lieut. (48) Sherman, Lieut. W. C. (151) Winder, Lieut.-Col. C.B. (130) Navy.