Book/Printed Material Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks,
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Image 1 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks,- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 2 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, SUBMARINE BLASTING IN BOSTON HARBOR MASSACHUSETTS REMOVAL OF TOWER AND CORWIN ROCKS BY JOHN G FOSTER LIELTTENANTCOLONEL OF ENGINEERS AND BREVET MAJOR GENERAL U S ARMY T_T S I I 0 1T...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 3 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, Entered according to Act of Congress in the year 1869 by D VAN NOSTRAND in the Clerks Office of the District Court for the Southern District of New York- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 4 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, REMOVAL OF TOWER AND CORWIN ROCKS NARROWS OF THE ENTRANCE TO BOSTON HARBOR MASS BY DRILLING AND BLASTING THESE rooks were situated see Plate 1 in the main ship channel between the...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 5 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 4 The two rocks were ridges of the same general ledge which extends beneath the channel running in a northeast and southwest direction An examination of Corwin Rock by divers disclosed the...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 6 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 5 ESTIMATED COST AND CONTRACT The cost of removal of these rocks to the depth of 23 feet at maen low water as estimated by the Board of Harbor Commissioners of the...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 7 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 6 COMMENCEMENT OF THE WORK TOWER ROCK Tower Rock being the smaller of the two was selected as the one to be first removed Its horizontal dimensions being only 50 by 26...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 8 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 7 produced the desired effect The rock was rent in pieces and by drilling additional holes and continuing large charges of this powder the rock was finally reduced to the required depth...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 9 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, W 8 sporting powder The drilling machine was therefore called into requisi tion as before and used continuously to the completion of the work On account of the extent of this rock...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 10 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 9 had therefore to be drilled at each of these points to blast them off This occupied much more time than could reasonably have been expected so that it was not until...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 11 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 10 DESCRIPTION OF THE SUBMARINE DRILLING MACHINE USED AND ITS MODE OF OPERATION This machine Plate 2 consists generally of a drill a drill stand or guide a clutch or hoister and...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 12 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 11 its gripe upon the drill shaft has become disengaged by a trip pin on the spiral guide against which the fork of the clutch strikes in its ascent The spiral guide...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 13 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 12 The crank plate continuing its revolution the drill line and chain is lowered permitting the clutch to descend to its first position ready to gripe and raise the drill again The...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 14 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 13 2 Plate 4 placed on the upper guide plate and operated by a vertical groove in the drill shaft and a pin on the ratchet It was found that the drill...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 15 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 14 to him for the purpose to the drill stand and then signals to hoist away upon which the whole machine is quickly hoisted on deck After an examination of the hole...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 16 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 15 After some experience such facility was attained in drilling and blasting as to enable the work to be continued in a rough sea and during all stages of the tide To...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 17 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 16 POWDER USED The powder used in the drill holes at first as previously stated was common blasting powder This proving too weak to rend the rock Du ponts best sporting powder...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 18 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 17 The price paid for this was 15 per box of 20 pounds An effort was made to obtain nitroglycerine at first but unsuccess fully as none could at that time be...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 19 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 01It 18 CARTRIDGES Of these numerous varieties were tried in the search for one that combined all the requisites of impermeability to water lightness incompressibility and cheapness Lightness or buoyancy of material...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 20 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 19 ertAIWP t7772gCrt mouth was easily made water tight by being tightly wrapped around the electric wire with twine and then covered with a water tight compound They had however the defect...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 21 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 20 getting a new charge down to the bottom They might also jam in an angular hole A similar difficulty was experienced in the use of some gun metal cylinders cast like...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 22 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 21 Great pains were always taken to make the mouths of the cartridges where these connecting wires entered the charge hermetically tight by means of a tight fitting cork or wrapping of...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 23 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 22 lightness and compactness recommends it for service in the field to fire temporary mines fougasses etc or on the coast to fire the torpedoes used against shipping or in forts to...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 24 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, 93 ing in the drill holes successive small charges without tamping until seams were started in various directions and then using a heavy charge of patent powder with a good tamping like...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 25 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, GALLOPS ISLAND Me ow Tate Len _ As ilreree _Lire 1 ate oThA Wars rimv96z altatr 7T Ell Tt 0 VAX NOSTRAND Publisher ForfhCarren Plate of the NARROWS ra BOSTON I lAlt...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 26 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, SithIMAPILNY TOWER CORWIN ROCKS in130STON 114111011 1837 klf3CR 61xre 11- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 27 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, ILET Al 143 fr iI2A1115 N t11 TOWFR CORWIN 110 n BOSTON 11Ali B011 direction ofliptiify iienenalIZAnterkinlineloPErgineens n118674868 ede of Peet Piss 4dan Limns moan Finn orincecteol upperW1e Se ion Asti 41onnic...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 28 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, Plate 5 0 ii sod at the S BL1ST LNG S TovEtt comsLN Rocas Jr BOSTON HAI I 3 0 I t in B167 NA orthalhe Ca Pt r ebee kir Charsoe...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 29 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, Plate C riYZgE EN81J1A711 WISizsT noir in connection with cc poriaLle Aintion Water at the Sin IARINE REAST1N GS on TOWER COWEN I ZOCKS in BOSTON HARBOR uaer dipectioz arBvtitra GentaLtaiitpri1LlunriciVweierefw 188719611...- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 30 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks,- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01
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Image 31 of Submarine blasting in Boston Harbor, Massachusetts. Removal of Tower and Corwin rocks, LIBRARY OF CONGRESS 111111 11111T 11411E11 ILE 0 007 883 417 1 II- Contributor: Foster, John G. (John Gray)
- Date: 1869-01-01