Dirigible Balloons: Instruction Paper
Chicago, IL: American School of Correspondence, 1918. Very Good -. Item #38634
Chicago, IL: American School of Correspondence, 1918. Later Edition. Slim octavo; publisher's printed paper-covered boards; [2],67pp.; illus. throughout. Boards a bit worn at corners and chipped at spine ends, later ex libris to front pastedown, else About Very Good, internally clean and sound.
Correspondence course textbook on all things dirigible first published in 1912 and possibly updated for a wartime audience. Contents progress from hot air balloons to Zeppelin airships. Concludes with the examination paper ("Discuss the advantages of the kite balloon over the aeroplane for observation"; "Is the Zeppelin effective? Discuss fully").
Price: $125.00