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Lynn Harbor - Proposed Dolphin

Mahon River - Wood Float For Bell Buoy

Manana Island - Sheet 1 Machinery & Piping Plans

Manana Island - Sheet 2 Machinery & Piping Plans

Manatee River - Proposed Head Frame, Platform & Hoisting Gear for 8 Day Lamp

Manistique - Concrete Foundation

Manistique - Concrete Foundation

Manistique - Diaphone Plans

Manistique - Electrical Installation

Manitou Island - Alterations Of Lens Pedistal

Manitou Island - New Fog Signal

Manitowoc North Breakwater - Details Diaphone & Windows

Manitowoc North Breakwater - Fog Signal Wiring Plan

Manitowoc North Breakwater - General Wiring Diagram

Manitowoc North Breakwater - Plot Plan

Manitowoc North Breakwater - Proposed Station

Marblehead - Plate 10 Door Hinge

Martins Industry - Deck Plan and Hold

Martins Industry - Sheer Plan and Half Breadth Plan

Mary Island - Boats Plan

Mary Island - Plate 14

Mary Island - Plate 15

Mary Island - Plate 16

Matagorda Island - Ball Bearing Mechanism for Chariot

Matinicus Rock - 1899 floor plans of stone keeper's house

Matinicus Rock - 1899 floor plans of stone keeper's house, proposed changes

Matinicus Rock - drawings for lens pedestal 1923

Matinicus Rock - drawings showing proposed alterations to dwelling in 1899

Matinicus Rock - floor plans of dwelling in 1899

Matinicus Rock - plans for mercury float, pedestal, and clock case

Matinicus Rock - plans for mercury float, pedestal, and clock case #2

Matinicus Rock - plans for mercury float, pedestal, and clock case #3

Matinicus Rock - plans for new lens and pedestal 1923

Matinicus Rock - principal keeper's dwelling floor plan 1911

Matinicus Rock - proposed plans for assistant keeper's dwelling

Matinicus Rock - proposed plans for assistant keeper's dwelling #2

Matinicus Rock - proposed plans for assistant keeper's dwelling #3