2 books here: 1- I. C. S. Reference Library 24 Published 1907 H/B 300 plus pages Book appears to have never been used, but has marks, bumps, etc, due to storage, but otherwise good condition. Still has the book mark which tells how to open a new book. Subjects covered: Sources and properties of heat Combustion and fuels Gaseous fuels Internal combustion engines Elements of electricity Ignition devices Carburettors lots of subheadings for each subject. 2- I. C. S. Library 26 Published 1907/08 H/B 300 plus pages Condition as above Subjects covered: Petrol motors Marine motors Motor details Motor vehicles Motor -car management Marine-motor installation Motor-boat management Power determinations Aviation motors