( ) 
The firft who has made Ufe of this Contrivance is 
Mr. Ralph ^llen^ Poft-mafterof Bath^ at hisStone- 
Qjiarry, where the Weight rais’d is 4 or 5, and fome- 
times 6 or y Ton. 
I need not fay that the Power to bring up the 
Weight works here by Means of a Capftane, or up- 
right Shaft, RO, drawn round by Horfes, that the 
Weight may come up more expeditioufly, though in 
the Figure the Handfpikes, /, e, b, going in at fuch 
an Hole as d, (hew that Men may work it upon Oc- 
cafion. 
The fame Gentleman having laid his Stone on 
Waggons of a peculiar Make, caufes it to run down 
Hill about a Mile and an half, on a wooden Wag- 
gon-way (which I (hall hereafter defcribe with the 
Waggon?, when I (hew the Society the Models, ^which 
are now making) to the River-dde, where he has a 
Wharf, and there by another Crane exadly fuited to 
the Work, he takes the Stone from the Carriages, and 
with great Expedition lets it down into the Barges or 
Veifels that come to fetch it. 
In defcribing this Crane of Mr. Allen*?^^ I (hall 
(hew how Accidents are prevented in this Manner of 
working. 
This Crane is of the Sort which is commonly call’d 
a Rafs l^ail Crane^ Fig. 7. moving round a ftrong 
Poll like a Wind-mill, fo that it may turn quite round 
with all its Load. The Axel Bb, on which the 
Rope winds, is here horizontal like a Winch ; but to 
gain Strength, inftead of the walking Wheel C A, 
it is carried round by a ftrong Wheel and Pinion, 
Fig, 5' and or is in Effedl a double Axis in Peri- 
trochio. Now in the common Cranes of this Kind, 
there 
