The articles of this series are from scripts of broadcasts over radio station WBAA. This series is a part of the Purdue UniversitySchool of the Air.There is one broadcast each week on some subject of mathematics. The first series had the general titleMathematics Is Where You Find Itand ran for thirteen weeks. A second series of thirteen broadcasts has the titleMathematical History and the Men Who Made It.The articles as here given are in the exact words in which they were broadcast. They have been timed to be read in thirteen and a half to fourteen and a half minutes a the rate found most effective for understanding by the radio audience. Rebroadcasting of these talks in the original form or with adaptations is permitted. Write to the author for specific permission for their use.