Map shows major railroad lines across the midwestern and northeastern states; state boundaries, cities and towns along railroad routes. Includes text notes in panels above and below map. Relief shown by hachures. Scale not given.

From Introduction: "The analyses given in this bulletin are of samples of delivered coal. This bulletin gives the results of analyses of samples delivered coal collected from July 1, 1915 to January 1, 1922."

From Introduction: "The officials of the North Butte mine we engage in making a study of ventilation problems before the coming of the investigators, so that opportunity was given to work with those officials for several months. This bulletin is a result of studies made from the data collected during the two and one-half years of study and observation above outlined."

One of the Pennsylvania Railroad's Mail-Express trains, headed by a K4s locomotive with a standard coach on the rear-end, rolls through the Pennsylvania countryside on a cold, dismal day in January 1923.