MICROCARDS Available to Purchase

SOME time has elapsed since the publication of Mr. Fremont Rider's article on Microcards in this Journal, but now, with the issue of The Microcard Bulletin, some interesting facts have become available. Technical development of these cards has reached a stage where they can be mass‐produced at a much lower cost than either books or microfilms, and this form of documentary reproduction has left the realms of theory for those of practical achievement.