From introduction: The production of gypsum is one of the oldest industries in Canada, and in point of gypsum output Canada ranks third among the countries of the world. Gypsum was discovered in the Maritime Provinces at a very early date, but there is no authentic record..of production until about 1822, when gypsum was mined on a small scale in Ontario. Since.then the production has grown slowly but steadily to more than a million tons. In 1928 the output was 1,205,846 short tons, valued at $3,622,007.

Road atlas of the United States illustrating paved roads with details of major cities followed by full page color maps of each state. Also includes a postal airway map, a highway mileage chart, logs of transcontinental federal highways, a transcontinental highway map, population information for U. S. cities based on the latest federal census data, and a descriptive gazetteer of states and territories.

A photograph print showing the Canadian National (CN) 6127, 4-8-4, Montreal, Quebec.

A topical, alphabetically arranged index to volumes 26-40 including experiment station records, publications reviewed, and foreign publications. In has a 'Consolidated Table of Contents' which lists all editorial notes and publications of the experiment stations and Department of Agriculture from the referenced volumes.

Technical paper issued by the Bureau of Mines over the Bowie-Gavin process. As stated in the introduction, "this paper describes a process and an apparatus designed to recover oil from such deposits" (p. 1). The results of experiments conducted using this process are discussed. This paper includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over studies on low-temperature carbonization of coal. Methods and equipment used during the studies are discussed. This paper includes tables, illustrations, and photographs.

Map of roadways of the region surrounding the Great Lakes, including Iowa, Kentucky, Wisconsin, New York, and the Canadian provinces Quebec and Ontario. The map includes major towns, bodies of water, and boundaries. The map also includes an inset map of the four Canadian road map sheets in this series bottom-center of the map. Scale [ca. 1,077,120] (17 miles to the inch).

Map of roadways in the Midwestern United States and southern portions of the Saskatchewan, Manitoba, and Ontario provinces of Canada. The map includes major towns and cities; bodies of water, including the Great Lakes; and boundaries. The map also includes an inset map of the four Canadian road map sheets in this series near the upper-right corner. Scale [ca. 1:2,217,600] (35 miles to the inch).

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 Porto Rico Station. 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 Porto Rico Station. Name and subject indexes start on page 901.

From Introduction: "In the following pages the writer has endeavored to give an account of the many methods, advantages, and disadvantages of preparing and burning powdered coal."

Letter from Lilia M. Forbes to C. C. Cox, following up her previous, unanswered letter. Envelope is included.

Letter from Lilia Forbes to C. C. Cox discussing recent local events and correspondence. Envelope is included.

American Newspaper Annual and Directory contains lists of newspaper publications (listed by counties) with census information, natural features and chief products. Volume 1 of 2. Additional information includes class and trade publications and maps. Index to Trade, Technical and Class Publications begins on page 1247, in Volume 2. Alphabetical index of Magazines, Technical, Trade and Class Publications begins on page 1343, in Volume 2.

American Newspaper Annual and Directory contains lists of newspaper publications (listed by counties) with census information, natural features and chief products. Volume 2 of 2. Additional information includes class and trade publications and maps. Index to Trade, Technical and Class Publications begins on page 1247. Alphabetical index of Magazines, Technical, Trade and Class Publications begins on page 1343.

Report issued by the Bureau of Mines covering petroleum laws of the U.S. and surrounding oil producing countries. As stated in the preface, "this bulletin includes the petroleum laws of (1) United States; (2) the several oil-producing States; (3) Canada; (4) Mexico; (5) the Republics of Central and South America" (p. iv).

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 Porto Rico Station. Name and subject indexes start on page 901.

Map shows geography, time zones, state borders, towns, and cities in the United States and Canada. Relief shown by hachures. No scale indicated.

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 Porto Rico station. Name and subject indexes start on page 901.

American Newspaper Annual and Directory contains lists of newspaper publications (listed by counties) with census information, natural features and chief products. Volume 1 of 2. Additional information includes class and trade publications and maps. Index to Class and Trade Publications begins on page 1213, in Volume 2.

American Newspaper Annual and Directory contains lists of newspaper publications (listed by counties) with census information, natural features and chief products. Volume 2 of 2. Additional information includes class and trade publications and maps. Index to Class and Trade Publications begins on page 1213.