Pure mathematics is the vanguard of all the sciences, it has marched centuries in advance of them all. For instance, Calculus was discovered nearly two hundred years before the science of Chemistry was far enough advanced to allow the use of Calculus as. One of its instruments of re search. Practically the same thing is true of all the other physical sciences, including engineering. It may he, therefore, that the science of theology is not yet far enough advanced to admit of the ready use of mathematics as an instrument of research. Today mathematicians are forging ahead into' realms of abstract thought and pure logic as never before; judging from. The past, some of the truths which they are revealing now may not be put to what we are pleased to call practical use for centuries to come.