Rare "Great Practical Encyclopedia of Electrical and Mechanical" (first volume), by Henri Desarces (Engineer of Arts and Manufactures, Ex-Professor Philotechnique Association) Publisher Aristide Quillet Paris, 1913 early twentieth century.
This encyclopedia is in good condition. It presents "demountable models" that unfold (see photos). It is complete.
A note: a piece of a model is broken (we have the song), some wear and tear on the cover and binding, paper slightly yellowed, see pictures