Report for Minots Ledge (Massachusetts) - 1922

District: 2nd
Inspector: F.J. Morse, 1st Asst. Supt.
Location: On outer Minots S of entrance to Boston Harbor
Date of Report: 02/12/1922
Latitude: 42° 16' 11"
Longitude: 70° 45' 35"
Site: Purchase, shore station (tower submarine site)
Date of Reservation:
Date of Deed: 07/17/1885
Date of Permission:
Date of Lease:
Area of the Entire Site: 8.5 acres
Area Inclosed: Whole
Character of Soil:
Distance of tower from Nearest High-Water Mark: Tower built on submerged rock
Inclosures to Premises / Type of Fence: Wire board fence & stone wall
Wharf or Landing on Premises: Wharf & boat slip (shore station), ladder on tower
Road to Land or Wharf Chararacter of and Distance:
Means to Reach Light Station: By boat from shore station, by public conveyance to shore station, about 2 3/8 miles
Distance to Nearest Road:
Distance to Post Office:
Distance to Village:
Facilities for Public Conveyance:
Facilities for Private Conveyance:
Means Used for Support of Lantern: Tower
Number of Separate Lights: One
First Built or Established: 1850
Last Rebuilt, Repaired, or Renovated: 1860
Condition at This Date:
Shape of Tower in Plan:
Form of Tower:
Height from Base to Ventilator Ball:
Height of Focal Plane Above Mean High Water: 85'
Background of Lighthouse as Seen from Sea: Sky
Color of Tower: Dark grey
Color of Tower/ How Produced: Natural granite color
Tower Connection: Keeper's dwellings on mainland about 2 1/4 miles distant
Object of Navigation: Seacoast, general navigation
Building Materials: Granite
General Description:
Wall Thickness at Base:
Wall Thickness at Parapet:
Diameter at Base:
Diameter at Parapet:
Kind of Stairway and Steps: Iron
Number of Landings:
Size of Glass: 21 3/4" x 10 1/8"
Number of Windows and Size of Sash: 10; 25" x 26"
Number of Doors: 1; 3' 2" x 6' 10"
Kind of Foundation and Depth Below Surface:
Character of Soil Surrounding the Lighthouse:
Soil Susceptibility:
Miscellaneous Remarks: Tower in excellent condition.
Lantern and Fixtures
Order of Lantern: 2nd
Shape of Lantern: Polygonal
Diameter to Glass:
Diameter in the Clear:
Number of Sides: 10
Type of Bars: Vertical
Thickness of Bars: 1 1/8"
Height Glazed: 8' 2.5"
Number of Plates in Height: 3
Number of Plates Each Side: 3
Thickness of Plates: 3/16"
Size of Plates: 35" x 31 1/4"; 31" x 31 1/4"; 31 1/4" x 29 1/4"
Number of Storm Panes:
Unglazed Side of Lantern:
What Bearings:
Construction Material Lantern: Bronze
Construction Material Roof / Cowl: Copper
Ventilator / Cowl: Copper
Lightning Spindle: Copper, 7' long
Description of Lightning Rod:
Balustrade: Yes, bronze
Lantern Doors: Bronze fitted with hinges
Floor of Lantern: Bronze
Watchroom Doors: None
Parapet Diameter:
Location / Number: Lower part of lantern
Ladders / Cleaning Arrangement: None
Curtain Hooks / Hanger: Spring roll curtains

How is Watchroom Fitted: Work bench stove, desk, tool chest & fog bell machine
How is Relief Called: Electric bells
Where is Call System Led: From lantern to each room
Illuminating Apparatus
Kind of Apparatus: 3 hours
Intensity in Candles: 75,000
Name of Maker: F. Barbier & Cie
Year Made: 1893
Marks and Number: BF/98
Order of Apparatus: 2nd
Inside Diameter: 4' 7"
Light Characteristic:
Time of Revolution: 30 seconds
Flash Interval: 3-3-16 sec
Duration of Flash: 0.2
Arc of Each Fixed Part:
Number of Panels: 15
Number of Flash Panels: 8
Arc of Each:
Number of Elements in Central Drum: 8 elements in each of 4 panels. 14 in each of 3 ; 13 in 1; 11 in 7
Number of Prisms Above Center Drum: 15 flash
Number of Prisms Below Center Drum: 6 flash
Does Apparatus Revolve?: True
Is There a Revolving Belt?: False
Revolving Panels:
How Flash is Produced:
Number of Vertical Elements Panel:
Fixed Lens Covered:
Pedestal: Iron
Service Table:
Draft Tube Description:
Revolving Machinery:
Standby and Description:
Chariot Float or Balls: Mercury float
Chariot Description:
Length of Drop Tube: Guard only
Clock Weight: About 100 lbs
Length of Winding Time: 3 hours
Drive During Rewind: Yes
Machinery Protection: Glass case
Regulated: Ball governor
Lens Protection:
How Color is Produced:
Red Sectors Description:
Where Color Attached:
Form of Colored Glass:
Lamp Description: 35 mm IOV
Type of Illuminant: Kerosene
Number of Spare Lamps: 1
Number of Spare Burners: 3
Candle Power: 500 cp

Clock Cord Description
Revolving Cord: Galv.iron
Size of Clock Cord: 3/8"
Length of Clock Cord: 50'
How Led: Through 3 sheaves
Diameter and Length of Clock Drum: 4" x 10"

Vapor Oil Lamp
Number of Wicks or Mantels:
Diameter of Outside Wick:
Diameter of Mantel: 1 1/4"
Diameter of Circum Circle: One only

Mercury Float
Inside Diameter of Trough: 2' 9.5"
Inside Depth of Trough: 13.5"
Outside Diameter of Float: 2' 9 1/4"
Depth of Float: 14"
Weight of Mercury in Pounds: About 500
How Often is Mercury Renewed: Never has been renewed
Closets and Store Rooms
Tower Closet Use: 10 closets each fitted with shelves & used for storage
Oil House Description: At shore station no fittings
Oil House Inside Dimension: 8' 2" x 9' 9"
Oil House Construction Material: Bricks
Oil House Capacity: 450 5-gal cans
Other (Describe):
Fog Signal General
Fog Signal Kind: Bell struck by machinery
Time to Start: Immediately
How Long Will Pressure Last:
Year of Manufacture:
Characteristic: 1 stroke 30 sec silent
Duplication: Necessary parts
Timing Device:
If whistle, siren, or trumpet, Pressure at Which Blown:
Height Above Water:
Compass Direction:
Location: On lantern gallery guide to Boston Harbor
Distance and Direction:
Water Supply:
Reached from Lighthouse: On gallery
Description of Fog Signal Building: None
Pressure And Recording Gauge:
Bell Signal
Weight: 975 lbs
Metal: Bell metal
Diameter: 3'
Height: 2' 2"
Time: 1 hour
Manufacturer: Lighthouse Machine Shop, 2nd District
Weights for Operation: 1000 lbs
Location: 2 double dwellings on mainland about 2 1/4 miles SW'ly from tower
Coloring: White with lead colored trimmings
Construction Materials: Wood
Number of Rooms: 6 each suite
Number of Dwellings: 2
Heating Plant: Direct hot water each
Number of Keepers: 2 in 1 & 1 in other dwelling
Furnished Quarters: All
NOT Furnished Quarters: None
Outhouses: 2 fuel houses, 1 storehouse & 1 barn
Outhouse Coloring: White, lead trimmings
Paths and Walks: Paths & gravel driveway
Area Inclosed:
Area of Garden:
Area Timber or Shrubbery:
Cultivation Area Available: 1 acre
Area Cultivated: 1/4 acre
Character of Surroundings: Fast ground, ledges & rock
Stove, Maker: Magee Grand (3)
Stove, Size: 7-18 (3)
Sink, Maker: Not known
Sink, Size: 22" x 48" (3)
Pump, Maker: Douglas (3)
Pump, Size: #2 (3)
Lamps: 3 brass table, 3 brass hand lamps from General Depot
How Procured: Town service at shore, tower supplied by tender
Quality: Good
Quantity: Ample
Injury Possible: No
Purity Precaution: None at shore station, In the tower by frequent cleanings
Tank Capacity: Tower about 1500 gal
Tank Material: Concrete & granite
Distilling Apparatus: False
Distilling Manufacturer:
Well Description:
Well Diameter:
Well Lining:
Pump or Bucket:
What Power Used:
Distance from Dwelling:
General Opinion: Healthful
Diseases: None
Local Causes:
Recommended Improvements: No
Access to Lighthouse: Wharf & boathouse at shore station. Road leading to shore station
Distance and Direction: About 2 1/4 miles W'ly from tower
Miscellaneous Remarks: Tower in good condition, dwellings & outbuildings at shore station fair, wharf at shore station very poor.
Boat #1
Boat Number: 27
Type: Launch
Length: 6' 9"
Width: 25' 5"
When Built: 1898
Date Harbored at Station: 1920
Sails: True
Suited to Work: Yes
Boat #2
Boat Number: 29
Type: Dinghy
Length: 4' 4"
Width: 12'
When Built: Unknown
Date Harbored at Station: 1911
Sails: False
Suited to Work: Fair, on davits at tower
Boat #3
Boat Number: 136
Type: Dory
Length: 4' 6"
Width: 13'
When Built: 1918
Date Harbored at Station: 1918
Sails: False
Suited to Work: Yes

Power Boat
Engine Type: Gasoline
Horsepower: 7.5
Engine Maker: Knox, no number, no date
Spare Coil: None
Magnet: None
Battery: Dry - 6
Propeller Diameter: 18"
Propeller Pitch: 21 pitch, 3 blade

General Information:
Boats on Station: Boats #136 & 27 at shore station in boathouse; #29 on davits at tower.