South African Class 24 2-8-4 August 2010. This locomotive was rechristened "Jenny" in 2011 in honour of the late Jenny Pretorius, a much respected South African steam preservationist. 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
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