In the spring of 1933 Mr. Edwin Over, Jr. of Colorado Springs made a mineral collecting trip in the interest of the Harvard Mineralogical Museum. The largest part of his time was spent at Topaz Mt. in the Thomas Range, Utah, and he succeeded in obtaining a very fine suite of the well-known topaz of that locality. He also added several minerals to the paragenetic series there as hitherto recorded. These additions are pseudobrookite, beryl, fluorite and calcite.