On The Choice of a Common Language by H Jacobs.
 
As nations draw closet together the need of the peoples for international communication is urgently felt. This short history of the many attempts made during the last 300 years shows that to-day a second auxiliary language is a practical possibility.
 
The simple and regular structure of a planned system is in itself an introduction to comparative language-study, Teachers can use it to demonstrate the patterns of language, and the nature, growth, and development of the Latin-derived tongues.
 
With a preface by J A Lauwerys.