Mathematical wrinkles for teachers and private learners, consisting of knotty problems;mathematical recreations; answers and solutions; rules of mensuration; short methods; helps, tables, etc., (1923)
Jones, Samuel I. (Samuel Isaac), 1880- · Nashville, Tenn., S. I. Jones · leaf 75
MATHEMATICAL RECREATIONS 65 is common to the two sidings is long enough to permit of a single car like P or Q, running in or out of it ; but it is too … short to contain the whole of an engine like R. Hence if an engine runs up one siding, such as DBA , it must come back the same way. Car No. 1 is .placed at B, car No. 2 is placed at C, and an engine is placed at E. By the use of the engine interchange the cars, without allowing any flying shunts.…
