342
(■United
3. An electro-duplicate from the matrix No. 2, onwhich contour lines and other additions and alterationshave been engraved, from the Ordnance Survey in 1S46-8,and two impressions of it, one of them taken immediatelyafter its separation from the matrix, and the other takenfrom it in its present finished state.
These specimens show more particularly the manner inwhich the process of electrotyping is applied to the pur-pose of revising the maps of the Ordnance Survey of thenorthern counties of Ireland , which must without its aidhave been engraved entirely anew, as it would have beenimpossible to have carried out, on the original copper-plates, the extensive alterations which are necessary.
4. An original copper-plate of the Ordnance Survey ofthe City of Dublin, and an impression of it.
5. An electro-matrix of No. 4.
6. An electro-duplicate of No. 4, and an impressionof it.
7. An unfinished copper-plate (as an index to the 5-feetplans of Manchester and Salford ), prepared by electro-typing matrices from three different plates of the Ord-nance map of Lancashire , on the scale of 6 inches to amile = Tssrai removing the detail exterior to the townportion from the matrices, filing off the edges of thematrices at the junction lines of the sheets, and thendepositing a duplicate plate on the joined matrices.
129 Ellis, F. A., Commander R.N., Great Yarmouth —Inventor.
Model of a yacht, with a sliding keel, to enable her togo up shallow rivers and over bar-harbours. A methodof suddenly lowering the mast to a level with the deck ina gale of wind. A projecting bow, which tends to keepthe vessel up in a sea-way.
130 Macnab, John, 25 York Place, Edinburgh —Inventor.
Model of an improved first-class sea-going steam-ship.
131 Green, Richard, Blackmail —Owner.
Model of the “ Owen Glendower ” East Indiaman, builtat Blackwall.
132 Howe, Joseph, Newcastle-upon-Tyne —Maker.Model of a clipper merchant schooner, complete and in
working order.
133 Downs, Henry, Mile Town, Sheerness —Designer.Model of a corvette of 20 guns, regularly built, fitted,
armed, and rigged.
134 Lamport, Charles, Workington —Designer.
Model of one of Messrs. Lindsay & Co.’s line of ships
to Calcutta ; 800 tons register.
135 Clarke, Joseph Augustus, 7 Hamilton Square,
Birltenhead —Designer.
Model of a steam vessel to a scale of half an inch to thefoot; intended to represent a steam vessel of improvedconstruction, and to show how increase of speed may beobtained by using wheels with moveable floats, instead ofwheels with fixed, floats: wheels with moveable floats areattached to the model.
136 Northumberland Life-boat Committee,Somerset House, London —Producer.
Models of life-boats sent in to compete for the premiumof 100 guineas, offered by the Duke of Northumberland,with the names of the designers or builders. Communi-cated by Captain Washington, R.N., F.R.S.
1 Ainsworth, John, Bridlington, Yorkshire .
Model of life-boat. Scale, 1 inch to a foot: length,
34 feet; breadth, 9 feet; depth, 44 feet.
2 Anderson, Thomas, North Shields , Northumberland.Model of life-boat. Scale, 3 inches to a foot: length,
40 feet; breadth, 11§ feet; depth, 4 feet.
3 Beeching, James, Great Yarmouth, Norfolk .
Model of life-boat. Scale, 1 inch to a foot: length*
36 feet; breadth, 94 feet; depth, 3-J feet,
4 Bertram, James, 16 East Street, Manchester Square,
Model of life-boat. Scale, 1 inch to a foot : length*304 feet; breadth, 9 feet; depth, 24 feet.
5 Blair, Robert, South Shields , Northumberland.Model of life-boat. Scale, 1 inch to a foot: length*
35 feet; breadth, 12 feet; depth, 4J feet.
6 Bosch, P. Van Den, Oosterhout, Netherlands .
Model of life-boat. Scale, 1 inch to a foot: length*
24 feet; breadth, 4£ feet; depth, 2 feet.
7 Bremner, James, Wick, Scotland .
Model of life-boat. Scale, 4 inch to a foot: length*33 feet; breadth, 12 feet; depth, 34 feet,
8 Bromley, Gilbee, Sheerness , ILent.
Model of life-boat. Scale, 1 inch to a foot: length*32 feet; breadth, 7 feet; depth, 3 feet.
9 Browne, John Harcourt, Moorgate Street, London .Model of life-boat. Scale, 14 inch to a foot: length*
23 feet; breadth, 6 feet; depth, 34 feet.
10 Costain, Thomas, Liverpool.
Model of life-boat. Scale, 1 inch to a foot: length*30 feet: breadth, 9J feet; depth, 34 feet.
11 Edmond, John, Scarborough, Yorkshire .
Model of life-boat (coble). Scale, 1 inch to a foot"
length, 27 feet; breadth, 74 feet; depth, 2f feet.
12 Falkingbridge, William, Whitby, Yorkshire .Model of life-boat. Scale, 1 inch to a foot: length*
354 feet; breadth, 8 feet; depth, 34 feet.
13 Farrow, George, South Shields . ,
Model of life-boat. Scale, 1 inch to a foot: length*
30 feet; breadth, 10 feet; depth, 3f feet.
14 Francis, Joseph, New York, United States . ,
Model of surf life-boat. Scale, 1 inch to a foot: length*
27 feet; breadth, 7 feet; depth, 24 feet. h
Model of cutter. Scale, 1 inch to a foot: length*274 feet; breadth, 64 feet; depth, 3 feet. ^
Model of life-car. Scale, 1 inch to a foot: length’2fiJ feet; breadth, 74 feet; depth, 64 feet.
15 Gale, John & Robert, Whitby, Yorkshire . ,
Model of life-boat. Scale, 1 inch to a foot: l en f* ’
30 feet; breadth, 11 feet; depth, 34 feet.
16 Gale, G. Hamlyn, Swansea. ,u
Model of life-boat. Scale, 1 inch to a foot: l ell 8 ’
284 feet; breadth, 7f feet; depth, 24 feet.
17 Gaze, Thomas, Mundesley, Norfolk . a,
Model of life-boat. Scale, 14 inch to a foot: l en »
30 feet; breadth, 10 feet; depth, 4J feet.
18 Grant, William, Southsea, Hampshire. a.Model of life-boat. Scale, 1 inch to a foot: le n e
25 feet; breadth, 7f feet; depth, 24 feet.
19 Greener, William, Birmingham . ofr,
Model of life-boat. Scale, 1 inch to a foot: Je e
37 feet; breadth, 12 feet; depth, 24 feet.
20 Gurr, Charles, Portsea, Hampshire. n( rtb*
Model of life-boat. Scale, 1 inch to a foot: 0
30 feet; breadth, 74 feet; depth, 3 feet.
21 Hall, Messrs., Aberdeen. , nD tli>
Model of life-boat. Scale, 1 inch to a foot: 0
334 feet; breadth, 84 feet; depth, 4 feet.
22 Harding, J. & J., Whitby, Yorkshire . . . gth*Model of life-boat. Scale, 1 inch to a foot:
30 feet; breadth, 10J feet; depth, 3} feet.
23 Harvey, T., & Son, Halifax, Lpswich. . gth*Model of life-boat. Scale, 14 inch to a foot.
41 feet; breadth, 11 feet; depth, 4 feet.
24 Hatt, Cyprian, Lowestoft, Suffolk . . , n gtb*Model of life-boat. Scale, 1 inch to a loo
35 feet; breadth, 12 feet; depth, 44 feet.