South African Class 15A 4-8-2 of these locomotives had completed three million miles of heavy-duty mainline work. The table lists the Class 15A engine numbers, builders, years built, works numbers and eventual classifications. The main picture shows reboilered 1914-built Class 15A no. 1788 at Graaff Reinet on 4 April 1978. Differences between the various locomotive models are illustrated in the pictures below. South African Class 15A 4-8-2 The South African Railways Class 15A 4-8-2 of 1914 was a steam locomotive. Between 1914 and 1925, the South African Railways placed 119 Class 15A steam locomotives with a 4-8-2 Mountain type wheel arrangement in service, delivered in
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