Year of Photo / Document:
1921.11.19
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
648.98 KB
Optics
Manitou Island - Alterations Of Lens Pedistal
Year of Photo / Document:
1929.10.03
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
589.77 KB
Marblehead - 3 1/2 Order Fresnel Lens
Document Type:
File Type:
jpg (image/jpeg)
File Size:
138.49 KB
Marblehead - 3 1/2 Order Fresnel Lens (Opposite Side)
Document Type:
File Type:
jpg (image/jpeg)
File Size:
162.49 KB
Marblehead - Diagram Of Light Visibility
Year of Photo / Document:
1886.10.21
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
4.78 MB
Maritime Exchange Museum - 3rd Order
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
350.15 KB
Maritime Exchange Museum - 5th Order Lens With Reflecting Prisms
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
539.33 KB
Maritime Exchange Museum - 5th Order Lens, Spring Pt. Ledge ME
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
351.34 KB
Maritime Exchange Museum - Drum Lenses
Document Type:
File Type:
jpg (image/jpeg)
File Size:
290.12 KB
Maritime Exchange Museum - Lamp In Lens
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
305.71 KB
Maritime Exchange Museum - Lens Display
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
450.18 KB
Maritime Exchange Museum - Lens Display
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
267.82 KB
Maritime Exchange Museum - Lens Display
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
489.54 KB
Maurice River Range - Acetylene Setup Sheet 1
Year of Photo / Document:
1911.05.03
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
612.28 KB
Maurice River Range - Acetylene Setup Sheet 2
Year of Photo / Document:
1911.05.03
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
531.89 KB
Maurice River Range - Acetylene Setup Sheet 3
Year of Photo / Document:
1911.05.03
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
599.73 KB
Mayo Beach - Stephen Pleasonton Correspondence
Year of Photo / Document:
1844.10.17
Document Type:
File Type:
jpg (image/jpeg)
File Size:
178.3 KB
File Type:
pdf (application/pdf)
File Size:
164.45 KB
Mayo Beach - Winslow Lewis Correspondence
Year of Photo / Document:
1838.06.27
Document Type:
File Type:
jpg (image/jpeg)
File Size:
945.25 KB
Michigan Lighthouse Conservancy - 4th Order Lens
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
354.07 KB
Michigan Lighthouse Conservancy - 5th Order Lens
Document Type:
File Type:
jpg (image/jpeg)
File Size:
603.78 KB
Mile Rocks - Pedestal & Occulting Device 1
Year of Photo / Document:
1912.02.21
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
716 KB
Mile Rocks - Pedestal & Occulting Device 2
Year of Photo / Document:
1912.02.21
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
779.93 KB
Milwaukee North Point - Illuminating Apparatus
Year of Photo / Document:
1915.09.03
Document Type:
File Type:
jpeg (image/jpeg)
File Size:
1.23 MB
Minot's Ledge - Duel Motor Flasher Mechanism
Document Type:
File Type:
jpg (image/jpeg)
File Size:
966.94 KB
Montauk Point - Disassembled Lens
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
90.38 KB
Montauk Point - Disassembly Of Lens, 1
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
79.38 KB
Montauk Point - Disassembly Of Lens, 2
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
78.61 KB
Montauk Point - Disassembly Of Lens, 3
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
77.45 KB
Montauk Point - Disassembly Of Lens, 4
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
80.91 KB
Montauk Point - Drawing of Lens & Lantern
Document Type:
File Type:
jpg (image/jpeg)
File Size:
189.6 KB
Montauk Point - Lens Restored In Lantern
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
159.87 KB
Montauk Point - Reinstallation Of Lens
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
118.34 KB
Montauk Point - Vega Before Removal
Year of Photo / Document:
2023
Document Type:
File Type:
jpg (image/jpeg)
File Size:
147.88 KB
Moose Peak - 2nd Order Revolving Lens
Year of Photo / Document:
1939.01.14
Document Type:
File Type:
jpg (image/jpeg)
File Size:
1.55 MB
Morris Island - Notice To Mariners
Year of Photo / Document:
1816.10.18
Document Type:
File Type:
png (image/png)
File Size:
1.62 MB
Morris Island - Revolving Light
Year of Photo / Document:
1816.11.11
Document Type:
File Type:
png (image/png)
File Size:
491.43 KB
Mount Desert Rock - Items Needed To Repair Illuminating Apparatus
Year of Photo / Document:
1928.07.01
Document Type:
File Type:
png (image/png)
File Size:
7.88 MB
Mr. Fresnel's Lenses
Year of Photo / Document:
1825.02.26
Document Type:
File Type:
png (image/png)
File Size:
2.06 MB
Mukilteo - Request To Keep Fresnel Lens
Year of Photo / Document:
2008.07.07
Document Type:
File Type:
jpg (image/jpeg)
File Size:
192.48 KB
Navesink - 9,000,000 Candle Power
Document Type:
File Type:
jpg (image/jpeg)
File Size:
1.52 MB