South African Class 24 2-8-4 South African Class 24 2-8-4 The South African Railways Class 24 2-8-4 of 1949 is a steam locomotive. In 1949 and 1950, the South African Railways placed 100 branch line steam locomotives with a 2-8-4 Berkshire type wheel arrangement in service. By the late 1940s, the South African Railways (SAR) still had a comparatively large mileage of track. In South West Africa, where most of the locomotive fleet consisted of Classes 6, 7, GC and GCA, there were still hundreds of miles of track. Considering the increasing age of these locomotives, the options were either to relay these tracks with
Minim (unit) size of a drop can vary considerably depending upon the viscosity and specific gravity of the liquid. (At the time, the phenomenon of surface tension was not well understood.) The minim, on the other hand, was measured with a graduated glass tube known as a "minimometer", later known as the minim-tube. The minim-tube was a type of graduated pipette, a device invented in 1791 by François-Antoine-Henri Descroizilles. Apothecaries' measures are fully defined in the United Kingdom's Weights and Measures Act of 1878, but the UK's 1963 Weights and Measures Act provided for the abolition of the minim, fluid scruple, and