2-8-4 IS21 locomotives from Voroshilovgrad. The completed the last eleven in 1941 and 1942. Despite their moderate size compared to American and Canadian-built 2-8-4s, the Soviet 2-8-4 was a good example of a Berkshire type designed for heavy express and passenger train service. It had a grate, boiler pressure, boiler heating surface of which was superheated, and only 20 to 21 tons maximum axle load. Their diameter coupled wheels and cylinders of bore and stroke, with a total weight of 133 tonnes of which 80.7 tonnes were adhesive weight, enabled the locomotives to easily reach the maximum permitted speed of 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