| | | | Aiming devices |National Vitaphone | 5,700 | | 150 | Corporation, | | | | Plainfield, N. J. | | | | | | | Angle of |Atwater Kent | 4,468 | 4,401 | 4,468 site instruments | Manufacturing Co., | | | | Philadelphia | | | | | | | Do. |Blair Tool Machine Co., | 1,090 | 1,090 | 1,090 | New York City | | | | | | | Azimuth instruments,|Warner & Swasey Co., | 129 | 126 | 129 model 1910 | Cleveland, Ohio | | | | | | | Azimuth instruments,|Spencer Lens Co., | 669 | | 1 model 1918 | Buffalo, N. Y. | | | | | | | Boards, |Premier Metal Etching Co., | 13 | | gun deflection | New York City | | | | | | | Boards, |Metallograph Corporation, | 628 | | Pirie deviation | New York City | | | | | | | Boards, plotting |McFarlan Motor Co., | 4,811 | 4,811 | 4,811 | Connersville, Ind. | | | | | | | Boards, Pratt range |F. F. Metzger, | 134 | | 65 | Philadelphia, Pa. | | | | | | | Boards, |Gorham Manufacturing Co., | 741 | | range deflection | Providence, R. I. | | | | | | | Boards, rocket |Liquid Carbon Co., | 3,000 | | 630 | Chicago, Ill. | | | | | | | Chronographs |Precision Thermometer Co., | 19 | 9 | 19 | Philadelphia, Pa. | | | | | | | Chronographs, |Leeds Northrup Co., | 20 | 18 | 20 Aberdeen | Philadelphia, Pa. | | |