1^8 
Account of JAt Morton’s Patent Slip for 
sliding and keel-blocks, with its truck and axles 
turned, and all other iron work complete, &c. 240 0 0 
3d, Chain of best Swedish iron, 230 feet, at 13s. 4d. 153 6 8 
4^^, Machine capstan complete, - - 65 0 0 
Patent right, confined to one set of railways, 
but may be transported to any other situation, as 
the whole apparatus can be stowed in little bulk *, 200 0 0 
L. 958 6 8 
Mason work, or piles for foundations, say - 150 0 0 
but this depends on the nature of the soil. 
L.1108 6 8 
In the preceding short account of Mr Morton’s slip, our on- 
ly object has been to convey to general readers some idea of its 
construction and advantages. Those who take a deeper interest 
in matters of this kind, will not fail to see the apparatus actual- 
ly at work, and to examine all the details of its construction, 
which evince much ingenuity and mechanical skill "j*. 
We shall now conclude this notice, with the opinion of one of 
the most skilful and scientific navigators of the present day, in fa- 
vour of Mr Morton’s invention. “ The advantage of such an ap- 
paratus,” says Mr Scoresby, in a vessel bound to the polar re- 
gions on discovery, might be very great, provided, in the place 
where there should prove a necessity for using it, the rise of tide 
should be sufficient for admitting its application, if the beach 
should be of a sloping nature. It could be prepared in short 
pieces, so as to be fitted together with screws ; and though in- 
tended for sustaining the weight of a ship, would be by no means 
very cumbrous. Indeed, any vessel of 200 tons burden, or 
upwards, might easily carry it out in her hold, without mate- 
rially, if at all, interfering with the room requisite for her stores. 
Thus a vessel having occasion to winter in Baffin’s Bay or Davis’ 
Strait, would require only the adjustment of the frame and 
ways, which three or four skilful mechanics might effect in a 
few days, before she could be hauled up on dry land quite be- 
* The patent right is £100 when the vessel is one of 100 tons, and £150 for 
one of 200 tons. 
■f An account of the experiments made in the Government Dock-yards, in haul- 
ing up ships of war upon common building- slips, will be found in the Sup. En&yc. 
Brit, art, Dockyard. 3 
