Item Number	Date	Description
More info . . .	1461	25 October 1935	St. Marys Falls Canal, Lock Filling Control-Signal System: Receiving filling signal-control valve set to repeat order back to lockmaster, combination receiver
More info . . .	1462	25 October 1935	St. Marys Falls Canal, Lock Filling Control-Signal System: Water level indicator, shelter 5N, Davis Lock, showing level in Fourth Lock
More info . . .	1463	25 October 1935	St. Marys Falls Canal, Lock Filling Control-Signal System: Water level transmitter, shelter 4N, Davis Lock, operating indicator on Shelter 5S, Fourth Lock
More info . . .	1463a	25 October 1935	St. Marys Falls Canal, Lock Filling Control-Signal System: Water level transmitter, shelter 4N, Davis Lock, operating indicator on Shelter 5S, Fourth Lock
More info . . .	1464	13 December 1935	St. Marys Falls Canal: Blocking in the Davis Lock for drydocking of floating plant the U.S. Engineer Office, Duluth
More info . . .	1465	17 December 1935	St. Marys Falls Canal: Floating plant (Duluth Office) drydocked in Davis Lock
More info . . .	1466	April 1936	Davis Lock: View of lower portion of block No. 216 in north wall
More info . . .	1467	April 1936	Davis Lock: View of joint between blocks Nos. 221-222 in north wall
More info . . .	1468	April 1936	Davis Lock: View of block No. 231 in north wall
More info . . .	1469	April 1936	Davis Lock: View of block No. 117 in south wall
More info . . .	1470	April 1936	Davis Lock: View of stepped call separating valve pit and debris pit No. 4
More info . . .	1471	5 December 1936	Davis Lock: Repairs to masonry; temporary housing under erection showing frame and canvas sections, bracing, and staging
More info . . .	1472	5 December 1936	Davis Lock: Repairs to masonry; temporary housing under erection showing method of supporting staging
More info . . .	1473	5 December 1936	Davis Lock: Repairs to masonry; temporary housing under erection showing method of roofing, arrangement of times supporting staging, etc., rear view
More info . . .	1474	28 December 1936	Davis Lock: Repairs to masonry; arrangement of compressors and receiver in compressor house

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