26. ALAI Vol. 7. r$ per Annum. L [POSTAGE PREPAID. THE GREAT AMERICAN DREDGES ON THE PANAMA CANAL. Fig. ITEE GREAT DREDGE AT WORK. Fig 2—ENGINES AND DRUM FOR OPERATING LADDER., scientific american, 1885-08-15
26. ALAI Vol. 7. r$ per Annum. L [POSTAGE PREPAID. THE GREAT AMERICAN DREDGES ON THE PANAMA CANAL. Fig. ITEE GREAT DREDGE AT WORK. Fig 2—ENGINES AND DRUM FOR OPERATING LADDER., scientific american, 1885-08-15
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