explanatory matter

There used to be a couple of lines of explanatory matter—an etymology, the occasional note on usage.

It has seemed to me that a source book designed to meet the requirements of teachers and classes in the better grade of secondary schools, and perhaps in the freshman year of college work, ought to comprise certain distinctive features, first, with respect to the character of the selections presented, and, secondly, in regard to general arrangement and accompanying explanatory matter.

Presently the Sheriff, a theatrical-looking young man in a slouch hat and trousers like a pair of door-mats, sidled in at the door; and an interpolated line of explanatory matter enquired:— "Will you come riding with me?"

A practical self-instructor for students, mechanics and motorists, consisting of thirty-seven lessons in the form of questions and answers, written with special reference to the requirements of the non-technical reader desiring easily understood, explanatory matter relating to all branches of automobiling.

This practical volume has been written with special reference to the requirements of the non-technical reader desiring easily understood, explanatory matter, relating to all types of automobile ignition, starting and lighting systems.