Details

File containing two items titled ‘Critical Points in Iron & Steel’ with dates between July 1918 and April 1921 and ‘National Physical Laboratory, Notes on the Theory of the Needham-Finnis Rangemeter’ by Mr. A. Campbell dated 2nd February 1916. These items were originally held in a box with red cover. On the spine is written ‘19B Dec 1918 Condensers’. There is ‘24/1’ written on the spine in white. On the front is written: ‘Standard Condensers 1&2 12/18, Capacitance Measurement 12/18, Needham-Finnis Rangemeter NPL Notes, E.M.F. of coil wound in Slot 1/18, Photo Etching 6/17, Critical Points in Steel, Method of Test 7/18, Sparking Distances, 3 Sheets 9285 4/21’. The box has been removed.