To the average pupil—or, for that matter, to the brighter one—the topic called Locus in any geometry text is generally distasteful. The reason may be far-reaching. Perhaps the subject is put in there because it has always been an integral part of an approved geometry course. Tradition! How many things are done in thy name! To many Locus is a detached section having no place in the unity of the whole. In some cases, it may be, the treatment of the topic is so superficial that genuine interest is impossible. Again it may well be that its Latin name marks it off as a thing of mystery. Whatever it is, the fact remains that, in many cases, the pupil can “get by” what he regards as a necessary evil only by sheer memorizing of subject matter which to him can have no practical application. And so Locus teaching goes on and on and such has been its history.