Browse Maps
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2019 | about 5 hours ago | 7 control points |
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2019 | about 6 hours ago | 3 control points |
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2019 | about 6 hours ago | 9 control points |
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2019 | about 7 hours ago | 3 control points |
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2019 | about 7 hours ago | 3 control points |
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1897 | about 8 hours ago | Unrectified |
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2019 | about 8 hours ago | 3 control points |
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2019 | about 9 hours ago | 5 control points |
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about 10 hours ago | 34 control points | |
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2019 | about 10 hours ago | 3 control points |
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Etap IV rys. 3
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2019 | about 11 hours ago | 3 control points |
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2019 | about 11 hours ago | 3 control points |
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Cambridge & Vicinity in Revolutionary Times compiled to show the parole limits of Burgoyne's officers 1777
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1777 | about 11 hours ago | 3 control points |
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Cambridge & Vicinity in Revolutionary Times compiled to show the parole limits of Burgoyne's officers 1777
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1777 | about 11 hours ago | Unrectified |
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2019 | about 12 hours ago | 3 control points |
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2019 | about 12 hours ago | 4 control points |
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2019 | about 13 hours ago | 3 control points |
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2019 | about 14 hours ago | 7 control points |
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2019 | about 15 hours ago | Unrectified |
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about 16 hours ago | 34 control points | |
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about 17 hours ago | 6 control points | |
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Pinkerton's extraordinary 1818 map of Holland. Covers what is essentially today's Netherlands between the Belgium and Germany. Offers excellent undersea detail regarding various shoals and other dangers, including the Broad Fourteen Sand. Also shows the elaborate system of canals and irrigation networks throughout the region. Offers considerable detail with political divisions and color coding at the regional level. Identifies cities, towns, castles, important battle sites, castles, swamps, mountains and river ways. Title plate in the upper left quadrant. Two mile scales, in Dutch and German Miles and British Statute Miles, also appear in the lower right quadrant. Drawn by L. Herbert and engraved by Samuel Neele under the direction of John Pinkerton. This map comes from the scarce American edition of Pinkerton’s Modern Atlas, published by Thomas Dobson & Co. of Philadelphia in 1818.
Links: Source / Biblio Ref
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1818 | about 17 hours ago | 24 control points |
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Ottoman World Map
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1803 | about 18 hours ago | 24 control points |
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1950 | about 23 hours ago | 6 control points |
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about 24 hours ago | 8 control points | |
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1 day ago | 5 control points | |
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2019 | 1 day ago | 6 control points |
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This is a sketch outline of the borders of Imperial Germany
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2019 | 1 day ago | 12 control points |
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2019 | 1 day ago | 3 control points |
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2019 | 1 day ago | 3 control points |
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2019 | 1 day ago | 3 control points |
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2019 | 1 day ago | 3 control points |
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2019 | 1 day ago | 4 control points |
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2019 | 1 day ago | 3 control points |
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2019 | 1 day ago | 3 control points |
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Map of the Mill Dam and the Back Bay from John Hales' A Survey of Boston and Its Vicinity 1821 Image copyright The City Record and Boston News-Letter, all rights reserved
I have previously written about Boston surveyor John Hales and his useful 1821 book A Survey of Boston and Its Vicinity; Shewing the Distance from the Old State House, at the Head of State Street, to all the Towns and Villages Not Exceeding Fifteen Miles Therefrom; Also the Intermediate Distance from One Place to Another, Together with a Short Topographical Sketch of the Country. Today's post shows a map of the completed Mill Dam from the same book. What follows is Hales' description of the Mill Dam. The letters in the text refer to points on the map, so click on the map to see a larger version.
"The Mill Dam a. b. c. d. e. just completed by the Boston and Roxbury Mill Corporation note: initial construction was approved in 1814, from Beacon Street in Boston to Sewall's Point in Brookline, is composed of solid materials and made watertight; its surface is horizontal about three or four feet above high water mark, fifty-feet in width and one mile and a half in length. This Dam cuts off and incloses about 600 acres of the southerly part of the Back or Great Bay, over which the tide before regularly flowed and renders the water that is now admitted therein subservient and manageable.
At c. f. there is a cross dam running from the main dam to Gravelly Point, which is also water proof, and divides the part of the Great Bay cut off by the long dam into two parts; the westerly part containing about one hundred acres is intended as a full basin, or reservoir of water. The easterly part contains about five hundred acres and is intended as an empty or receiving basin.
In the long dam at b. there are five pair of flood doors grooved in massy piers of hewn stone, each pair moves from their opposite pivots towards the centre of the aperture on a horizontal platform of stone until they close in an obtuse angle on a projected line cut on the platform from the pivots in the piers to the centre of the space, with their angular points northerly on the open or uninclosed part of the bay. The object of these doors is to close against the flow of tides and prevent the passage of water into the empty basin, consequently at high tide that basin will be empty, with the exception of the waste waters received, during the flow of the tide, from the full basin after having supplied the mills, which is calculated will not rise to a height sufficient to impede the power necessary to carry the works.
At d. there are six watertight sluices leading into the full basin. These sluices are to open every tide when the water in the outer or uninclosed part of the bay hath the ascendancy over the water in the full basin, in order to admit the flow of tide into the reservoir, and to be closed immediately at high water; by this process the full basin will be left full of water every tide as high as the tide has flown, if so high it is needed.
Gravelly Point in Roxbury is intended as the scite sic whereon mills or factories are to be erected, somewhat in the line g. g. g. between the full and receiving basins, and sluice ways are to be built from the full basin at h. h. & c. of a size sufficient to admit so much water as will move and keep in motion the power contracted for. The waste water therefrom falling into a raceway which conducts it to the empty basin, and this empty basin discharges itself every tide at low water through the flood doors, so that the reservoir is filled at high water and the receiving basin emptied at low water, by which means there will be a continual supply of water through the sluice ways from the full basin, to set and keep at all times in motion the mills, factories, or other water powers that are erected between the basins, and there will be a sufficient fall from the water in the full basin to the water in the receiving basin to prevent the mills from choaking sic, so that the powers may with propriety be said to be perpetual.
There are two roads leading from the long dam, one west by north to the Brighton road, the other south-westerly to the Punch Bowl village in Roxbury, both whereof considerably shortens the distance to Boston from the west and south-westerly parts of the country, and there is one road leading from the short dam to Roxbury Street."
Be sure to read other posts about John Hales: Circuit Round the Town of Boston and how to gauge one's walking speed along Boston Common.
Links: Source / Biblio Ref
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1821 | 1 day ago | 15 control points |
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2019 | 1 day ago | 4 control points |
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2019 | 1 day ago | Unrectified |
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Title
A plan of those parts of Boston, and the towns in its vicinity, with the waters and flats adjacent, which are immediately or remotely connected with the contemplated design of erecting perpetual tide-mills.
Contributor Names
Dearborn, Benjamin, 1754-1838.
Created / Published
Boston : Benjamin Dearborn, 1814.
Subject Headings
- Hydraulic engineering--Massachusetts--Boston Metropolitan Area--Maps
- Hydrology--Massachusetts--Boston Metropolitan Area--Maps
- City planning--Massachusetts--Boston Metropolitan Area--Maps
- United States--Massachusetts--Boston Metropolitan Area
Genre
Maps
Notes
- Includes index to dams, canals, and associated features.
- Available also through the Library of Congress Web site as a raster image.
- Copy imperfect: Soiled, torn, mounted on cloth backing.
Medium
1 map : col. ; 48 x 37 cm.
Call Number/Physical Location
G3764.B6N2 1814 .D4
Repository
Library of Congress Geography and Map Division Washington, D.C. 20540-4650 USA dcu
Digital Id
http://hdl.loc.gov/loc.gmd/g3764b.ct003491
Library of Congress Control Number
2011589324
Language
English
Online Format
image
Description
Includes index to dams, canals, and associated features. Available also through the Library of Congress Web site as a raster image. Copy imperfect: Soiled, torn, mounted on cloth backing.
LCCN Permalink
https://lccn.loc.gov/2011589324
Additional Metadata Formats
MARCXML Record
MODS Record
Dublin Core Record
IIIF Presentation Manifest
Manifest JSON/LD
Links: Source / Biblio Ref
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1814 | 1 day ago | 63 control points |
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2019 | 2 days ago | Unrectified |
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2019 | 2 days ago | 3 control points |
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2019 | 2 days ago | 3 control points |
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1914 | 2 days ago | 6 control points |
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1914 | 2 days ago | 9 control points |
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1914 | 2 days ago | 12 control points |
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1914 | 2 days ago | 10 control points |
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1914 | 2 days ago | 7 control points |
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1914 | 2 days ago | 11 control points |
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Lodged Plan 5506 Office of the Registrar-General and the Office of Titles, known as Land Victoria 2001 to 2014; Land Use Victoria 2014 - ct (In 3 layers)
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1911 | 2 days ago | 4 control points |
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1914 | 2 days ago | 7 control points |
