Wallace & Tiernan-Novadel-Agene Merger Announced On January 1, 1954, the merger of the associated companies, Wallace and Tiernan Co., Inc., and Novadel-Agene Corporation, into a single organization known as Wallace & Tiernan Incorporated was completed. Stock of the new company is listed on the American Stock Exchange. Subsidiaries include W. C. Hardesty Co., Inc., Richmond Manufacturing Company, Thompson Machine Co., Electro Rust-Proofing ' Corporation (N. J.) and Wallace and Tiernan Wallace & Tiernan is best known in the instrument field through its precision instruments such as altimeters, low pressure gauges, absolute pressure indicators, and other similar instru ments. Principal plants are located at Belleville, N. J.; Buffalo, N. Y.; Geneseo, N. Y.; Dover, Ohio; Toronto, Canada; and London, England. By HOWARD S. RAPPLEYE U. S. COAST AND GEODETIC SURVEY (RET.) N PRECISE TAPING, with tapes graduated in 100 units and differences in elevation to determine the grade or slope corrections. same units, the following table may be used For example, assume that a 100-foot tape was used between stakes or bucks having a difference of elevation (h) of 12.436 feet. The grade correction (C,) is then C1 = 0.7755+ (0.6 x 0.0013) or 0.7763 feet. Grade corrections are, of course, always negative in sign. To keep grade corrections accurate to four decimal places it is necessary to determine differences of elevation greater than about 1 foot to three decimal places. If the grade corrections are only carried to three decimal places, then h may be determined to only two decimal places up to a maximum h of about 5.00 feet. |