Memorandum from H. Abraham to Professor B.J. Bok, Dr Hogg, Dr Gascoigne, Mr Thomas and the Time Service staff on Herstmonceux meridian observations, detailing transit circle observations, tapes and manually operated punch, Melbourne and Sydney observations of photographic zenith tube stars, the Mount Stromlo transit instrument and punched cards, the Moon camera, the photographic zenith tube measuring machine, the Kustner polygon of photographic zenith tube groups, photographic zenith tube reductions, and ephemerides for photographic zenith tube stars.