... 1941 for Mafeking to test the instrument in the thick bush country west of that town, between Jan Masibi and Logaging. An off-road route through featureless bush country terminating at a landmark consisting of two tall bluegum trees near Logaging ... and tested by the Instrument and Wireless section of the Directorate of War Supplies in Chrysler House, Johannesburg. ... Van den Bos and the Military Instruction Manual give guidance on how to get the best out of the instrument6a#39;90.
|Title||:||Living Amongst the Stars at the Johannesburg Observatory|
|Author||:||Dirk J. Vermeulen|
|Publisher||:||Chris Van Rensburg Publications - 2006-01-01|