Mathematical wrinkles for teachers and private learners .. (1912)
Jones, Samuel I. (Samuel Isaac), b. 1880 · Gunter, Tex., S.I. Jones · leaf 76
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 B. 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.…
Mathematics · Mathematical recreations
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
