Numerous inquiries are constantly being made concerning the purpose of standard tests, the places where they may be purchased, and references describing their derivation and use. It is in the hope that a general answer to these questions might be presented in convenient form that the following descriptive list has been prepared. The statements concerning the organization and purpose of the tests are very brief and have been intended to present only the leading features of the tests. Anyone who contemplates using a given test should first read a more detailed description of it in order to determine whether or not it will be of value to him.