AMERICAN ENGINEER'S REFERENCE CARD NO. 4. WEIGHTS, EVAPORATIVE POWERS PER WEIGHT AND BULK. ETC. OF COALS. [FROM A DISCUSSION OF THE MERITS OF ANTHRACITE AND BITUMINOUS COALS ISSUED FROM THE OFFICE OF NAVAL INTELLIGENCE BUREAU OF NAVIGATION, NAVY DEPARTMENT, WASHINGTON.]...THE AMERICAN ENGINEER, 47 CEDAR STREET, NEW YORK.
[New York? 1893]. Small broadsheet, 5" x 7", printed on tan card stock, single hole punch at top. Rubberstamp at head of title: 'American Engineer and Railroad Journal' [a few letters partly affected by hole punch]. Very Good. Item #23400