Lot 215
7 vols. Engineering and conversion table volumes to include Engineering Tables and Data 32pp. (small booklet pencilled B.N.W to cover). NEL Steam Tables 1964, Edinburgh: Her Majesty's Stationery Office 1964, 4to, 146pp. The endpaper signed B.N. Wallis with taped in note paper pencilled formulae and taped in printed correction slip, also with loose printed supplement and taped in printed conversion Table 8 to the back. Conversion Tables And Technical Data 1962 by Bristol Siddeley 12mo, 128pp. (dedication inside "With best wishes from R illegible?"). A Pocket Book of Tables by Shell (dedication inside To B.N.W. from P.L.T.) 1956 12mo, 255pp. Rolls Royce Conversion tables circa 1950 12mo, 97pp. A booklet Direct & Inverse Log-Log Differential scales, signed to cover B.N. Wallis and A Selection of Tables for use in Calculations of Compressible Airflow 1952, 4to, 143pp.  £40-60