At head of title: Department of commerce and labor. Bureau of the census. S. N. D. North, Director. "Forms a part of the census of electrical industries for 1907. There have been three censuses of the telegraph systems of the United States. The first formed a part of the census of 1880. The others were made in compliance with the acts of Congress of March 6, 1902, and June 7, 1906, and relate to the years 1902 and 1907, respectively. The last two censuses were taken and the results were compiled under the supervision of Mr. William M. Steuart, chief statistician for manufacturers".