Trade Information Bulletin No.— mom i 
Price, 10 cents Nh, on i 
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FOREWORD re 
Transportation and communication form the base on which the 
industrial, commercial, and economic structure of a country is built. 
The exchange of commodities is dependent on adequate carrying 
facilities, the development of which in turn creates a demand for 
further exchange. There are few industries and business enterprises 
which could continue to operate for long without the services 
rendered by modern transportation and communication mediums. 
Thus, the progress made by the United States in this field is of 
interest to everyone in the country. 
Naturally, those most intimately concerned with the development 
of transportation are, first, the shippers of the country’s products, 
and, second, the transportation agencies themselves. But the interest 
extends much further than this. Manufacturers of locomotives, roll- 
ing stock, railway building material, and the myriad accessories 
which enter into the equipment of a railway system; builders of 
ships and marine engines; manufacturers of motor cars, trucks, and 
busses, and of airplanes and airplane motors; radio, telephone, tele- 
graph, and cable interests—all these, and in addition the industries 
allied with them, must find a survey of transportation and communi- 
cation in the United States of considerable value. 
The following report constitutes the Transportation and Com- 
munication section of the Commerce Yearbook, published. by the 
Bureau of Foreign and Domestic Commerce. In addition to the 
information reprinted on the following pages, the Yearbook contains 
reviews of commodity production in the United States and surveys 
of the principal industries and commercial services of the country. 
Copies of the Commerce Yearbook, bound in cloth, may be obtained 
from the district and cooperative offices of the Bureau of Foreign 
and Domestic Commerce, or from the Superintendent of Documents, 
Government Printing Office, Washington, D. C., for $1 each. 
Jurrus Kuen, Director, 
Bureau of Foreign and Domestic Commerce. 
Jury, 1926.