From abstract: This report is one of a series of publications on the geology and mineral resources of the Appalachian Plateaus. The areas described are the Butler and Zelienople quadrangles, which together include about 450 square miles in Butler, Beaver, and Lawrence Counties, western Pennsylvania.

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "A new photograph of Henry Picard, Pro of the Hershey Country Club, Hershey, Pa., golf star, and leading money winner for the winter tournament season so far."

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "The debate begins."

Copy of "David Mitchell and Descendants" originally written by Thomas Mitchell, Jr. The manuscript starts with David Mitchell, possibly a Revolutionary soldier, and details what is known about his life and those of his descendants. The record ends with the marriage of his widow, Sarah Patterson Mitchell Frear, to Abraham Frear. It states that she was the mother and grandmother of many Frears and Mitchells in the family. After the record, there is a note about the original manuscript's author; it was then copied by Ora Osterhout.

Outline of Problem: "This paper covers a survey of 19 ores collected from seven of the more important iron-ore districts of the United States and is a contribution by the ore-dressing section of the United States Bureau of Mines to general research program on iron and steel being conducted by the Bureau."

Revision of a report by the U.S. Bureau of Mines which described experiments performed in Pittsburgh, Pennsylvania to study mine gases. According to the foreword: "Much of the material is reprinted on the following pages in its original form, and changes have been made only where manifestly necessary. Laboratory methods have been brought up to date. Some types of apparatus described in Bulletin 42 have now become obsolete and newer designs are described instead" (p. 1).