Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.06 MB
Optics
Crisp Point - Light Characteristic
Year of Photo / Document:
1903.06.06
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
131.97 KB
File Type:
pdf (application/pdf)
File Size:
238.05 KB
Crisp Point - Light Characteristic Confirmation
Year of Photo / Document:
1903..06.24
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
91.7 KB
Desdemona Sands - 4th Order Lens & Pedestal
Year of Photo / Document:
1902.07.14
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
540.39 KB
Detour Point - Section Through Lantern & Lens
Year of Photo / Document:
1906.07.13
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
855.2 KB
Detour Point - Style A
Year of Photo / Document:
1906.02.13
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.13 MB
Detour Point - Style B
Year of Photo / Document:
1906.02.13
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.2 MB
Detour Reef - 3rd Order Lens Wiring & Mounting
Year of Photo / Document:
1931.08.24
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
406.82 KB
Detroit Depot - Checking The 200 M.M. Lantern
Year of Photo / Document:
1937
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
216.41 KB
Detroit Depot - Lamp Shop
Year of Photo / Document:
1932.04
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
358.15 KB
Detroit Depot - Lampist Work On Lens And Clockwork
Document Type:
File Type:
jpg (image/jpeg)
File Size:
452.52 KB
Detroit Depot - Lens At Depot
Year of Photo / Document:
1933
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
151.6 KB
Devils Island - 3rd Order Flashing Light
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
2.02 MB
Devils Island - 3rd Order Lens On Ball Bearings
Year of Photo / Document:
1899.05.20
Document Type:
File Type:
jpg (image/jpeg)
File Size:
395.11 KB
Devils Island - Ball Bearing Details
Year of Photo / Document:
1899.05.20
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
3.16 MB
Devils Island - Lens
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
233.88 KB
Devils Island - Lens Restoration
Document Type:
File Type:
jpg (image/jpeg)
File Size:
227.32 KB
Diamond Head - Alterations For Change Of Characteristic
Year of Photo / Document:
1913.12.24
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.52 MB
Diamond Head - Alterations For Changing Characteristic (1 of 2)
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.32 MB
Diamond Head - Alterations For Changing Characteristic (2 of 2)
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.73 MB
Diamond Head - Lamp Pedestal, Stand & Cluster
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
564.37 KB
Diamond Head - Red Sector
Year of Photo / Document:
2011
Document Type:
File Type:
jpg (image/jpeg)
File Size:
454.65 KB
Dry Tortugas - Henry Lepaute 2nd Order Lens
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
4.52 MB
Dry Tortugas - Installation of Oil Vapor Lamp
Year of Photo / Document:
1911.04.25
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
4 MB
Dry Tortugas - Mercury Float, Parapet
Year of Photo / Document:
1911.06.28
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
4.04 MB
Dry Tortugas - Proposed Clock Work Cord
Year of Photo / Document:
1911.07.24
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
3.45 MB
Eagle Bluff - Candlepower
Year of Photo / Document:
1926.06.22
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
294.71 KB
Eagle Bluff - Change From 3 1/2 To 5th Order
Year of Photo / Document:
1918.01.16
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
394.14 KB
Eagle Bluff - IOV Outfit
Year of Photo / Document:
1916.03.29
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
320.23 KB
Eagle Bluff - Oil To IOV
Year of Photo / Document:
1916.03.29
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
393.98 KB
East Brother - Lens On Display In Fog House
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
518.24 KB
Ecorse Range Front - 300 MM Passing Light
Year of Photo / Document:
1935.01.17
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
568.39 KB
Egg Island - Acetylene Installation (3 of 3) - Illumination
Year of Photo / Document:
1911
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
531.74 KB
Egmont Key - Measurements for New Occulting Apparatus
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
4.27 MB
Fairport Harbor West Breakwater - Sketch Of 3rd Order Lens
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
414.16 KB
Fenwick Island - Chariot Revolving Lens
Year of Photo / Document:
1908
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
905.85 KB
Fenwick Island - Chariot Wheels
Year of Photo / Document:
1908
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
691.02 KB
Fire Island - Lens Installation
Document Type:
File Type:
JPG (image/jpeg)
File Size:
3.25 MB
Fire Island - Temporary Arrangement Of An Electric Light Placed In A Regular 4th Order Lens
Year of Photo / Document:
1894.08.10
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
2.67 MB
Fort Gratiot - Flash Pannel
Document Type:
File Type:
jpg (image/jpeg)
File Size:
765.81 KB