The archives of such bodies as the Interstate Commerce Commission and Public Utility Commissions of the States are also bulging with documentary evidence.

Thus all the material contained in this volume--and much more--concerning the New York traction situation will be found in the investigation conducted in 1907 by the Public Service Commission of New York, Second District.
American business has also developed a great talent for publicity.
Nearly all our big corporations have assembled much material about their own history, all of which is public property.

Thus the American Telephone and Telegraph Company can furnish detailed information on every phase of its business and history.

Indeed, one's respect for the achievements of American industry is increased by the praiseworthy curiosity which it displays about its own past and the readiness with which it makes such material accessible to the public.

Despite the abundance of data, there is not a great amount of popular writing on these subjects that has much fascination as literature or much value as history.