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21. Fort Wayne, Plan of Stone Embrasure for Flanking Casemates

22. General Chart of the Northern and Northwestern Lakes, Including New York State Canals and Lake Champlain

23. St. Lawrence River, Detail Sheet No. 6, From Galop Rapids to Point Iroquois

24. Sketch of Fort Wayne, Showing the Condition of its Non-Armament, June 30th, 1869, in Response to Circular from Office of the Chief of Engineers, May 25th, 1869.

25. Design of Motor Launch No. 8 for the U. S. Lake Survey

26. Survey of N. and N.W. Lakes, Standards of Length

27. Fort Wayne, Plans & Sections Showing the Scarp Walls & Casemates to be Constructed at the East Bastion.

28. Steel Hull Screw Tug, Engineer, N.Y., for New York Harbor, N.Y., Midship Section

29. Survey of Northern and Northwestern Lakes, Design of Intersection Protractor

30. Design of Motor Launch No. 8 for the U. S. Lake Survey