"An investigation has been completed on several methods for the prevention and removal of ice on an airplane windshield. Tests were made on the use of electric heating, hot-air heating, and an alcohol-dispensing, rotating wiper blade. The results showed that vision through the airplane windshield could be maintained during severe icing conditions by the use of heat" (p. 1).

From Introduction: "The major purpose of this bulletin, as indicated in the preface by Dr. John W. Finch, Director of the Bureau of Mines, is to give a critical review of the coal-mining methods used in the principal producing countries of Europe, to describe the reasons underlying the adoption of these methods, and to contrast them with coal-mining methods employed in the United States."

Report discussing mining practices of a large number of metal mines in the United States and foreign countries and the adaptation of mining methods best suited to the various natural conditions in mines and their comparative costs. This bulletin is concerned primarily with mining or ore production and discusses milling and marketing only in brief.

Report issued by the U.S. Bureau of Mines over practices of metal mining. As stated in the introduction, "this bulletin summarizes mining practices of a large number of metal mines in the United states and foreign countries. The adaptation of mining methods best suited to the various natural conditions in mines is discussed, and comparative costs are presented" (p. 1). This report includes tables, illustrations, and photographs.

Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.

From introduction: The presentation of a yearly record of the Alaska mineral industry is a continuing service that has been rendered by the Geological Survey from almost the earliest years of extensive mining in Alaska, and the present report, for 1938, is the thirty-fifth of this series. 2 Such a record, especially when supplemented by the statistics for the preceding years, not only affords an authoritative summary of current 'and past conditions but also indicates trends that are of significance in suggesting the lines along which future developments of the industry are likely to proceed. These reports therefore serve miners, prospectors, and businessmen concerned with Alaska affairs as useful historical records, statements of contemporary conditions, and starting points on which some conjectures concerning future operations may be predicated.

From introduction: report.-This bulletin, which is published in two parts, contains the complete results of all spirit leveling done in South Carolina by the Geological Survey of the United States Department of the Interior, including those heretofore published.1 The 34th parallel of latitude, passing through Columbia, serves to divide the State into two sections, each of which is represented by one of the parts of the bulletin. Part 1 deals with the section lying north of the 34th parallel, designated as northern South Carolina, and part 2 deals with the section lying south of that parallel, designated as southern South Carolina.

A selection of Russian papers on the geochemical prospecting for ores

Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1938, activities, service reports, honors, finance, organizational leadership, and other information about scouting programs.

Volume provides abstracts of agricultural experiments conducted during the year. Also includes statistics, convention reports, bulletins, and bibliographies. Name and subject indexes start on page 865.

Bulletin discussing

Volume provides abstracts of agricultural experiments conducted during the year. Also includes statistics, convention reports, bulletins, and bibliographies. Name and subject indexes start on page 901.

Volume provides abstracts of agricultural experiments conducted during the year. Also includes statistics, convention reports, bulletins, bibliographies, and listings for Spanish edition publications from the Puerto Rico Station. Name and subject indexes start on page 721.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Volume provides a summary of the progress of each agricultural experiment station. Also includes statistics and selected studies.

The Journal contains the proceedings of the House of Representatives of Texas including legislation, reports, discussions, votes, and points-of-order. Some volumes also contain supplementary materials. The index begins on page 4829.

The Journal contains the proceedings of the House of Representatives of Texas including legislation, reports, discussions, votes, and points-of-order. Some volumes also contain supplementary materials. The index begins in Volume 2.

The Journal contains the proceedings of the Senate of Texas including legislation, reports, discussions, votes, and points-of-order. Some volumes also contain supplementary materials. The index begins on page 2321.