208 REPORT—1858. 
or outward thrust. Both these points had been attended with the most complete 
success, there being not the least perceptible outward thrust or change of form since 
they were put up. The latter fact was proved very satisfactorily by the plasterers, 
who were enabled to run the mouldings on the ceiling from the centre. The brackets 
for these mouldings were not gauged from a centre, but fastened to the ribs accord- 
ing to their sizes. In constructing these semicircular ribs, he was much struck with 
the small amount of springing or alteration of form. If the principle of these lami- 
native ribs were better understood, he was of opinion that many of our church- 
building architects would adopt it, instead of depending on three or four over-strained 
joints for one tie. 
Notice of some of the Articles shown in the Mechanical Section of the Leeds 
Exhibition of Local Industry. By J. Bucxton. 
The following are some of the chief articles exhibited :— 
A fine collection of malleable iron, boiler plates, and angle-iron as used in ship- 
building, locomotive crank and other axles, and wheel tires in various forms. 
A model of a weighing crane, designed for raising and weighing heavy goods at 
one operation. 
Naylor’s double steam hammer. A collection of engineers’ tools. 
A lathe for turning irregularly-formed pieces of wood, and an endless tape-saw ; 
also the adaptation of Comb’s expanding pulley to a drilling machine. 
Kemp’s woollen cloth dressing machinery. 
Taylor’s corn mill, with the upper stone stationary and the lower one revolving. 
The stones are 2 feet 8 inches and 3 feet in diameter, weighing 3 cwt. to 5 cwt. each, 
versus 15 cwt. to 20 cwt., the weight of ordinary millstones. The work is found to 
be done much more effectually, at a reduced cost of masonry and building. 
Carrett, Marshall, and Co. stationary pumping and other engines. 
Comb’s and Smallpage’s new double cam power-loom. In this power-loom all 
the movements for plain weaving are obtained from-one shaft perfectly balanced in 
itself and revolving at half the speed of the crank shaft of the old loom. In the 
shuttle used in the loom, the weft is packed into the shuttle in the form of a hollow 
roll, and drawn from the interna! surface. 
Holmes’ loom for working ladies’ corsets without a seam; it differs from the 
ordinary way of weaving, by the yarn being on several pulleys in small quantities, 
instead of all being on one beam. 
Miller’s card-setting machine. 
Haste’s new self-acting apparatus for preventing the explosion of steam boilers. 
A working model of Donnisthorpe’s wool-combing machine. 
On some modern Appliances for Raising Water. By W.E.CARRETT. 
The author, after alluding to the various kinds of pumps in use, proceeds to describe 
two combinations of the steam engine and pump in direct action. In each case the 
steam cylinder is directly over and in immediate communication with the pump 
beneath. A comparatively slight transposition of detail would arrange these hori- 
zontally, if required. ‘The first described was a steam pump of the high pressure 
transportable class, having a fly wheel and connecting rods to the crank shaft; also 
a modification of this for especial cases, where lightness and portability are requisite : 
the other was a compound high and low pressure condensing steam engine, also 
in direct communication with its pump, and of much larger proportions, used as a 
water-lift. 
The chief object in view is simplicity and durability of parts, a quiet and noiseless 
action, and, as far as possible, a superior duty effected with a minimum expenditure 
of power. One important feature to be observed is the application of the suctional 
and compressive air vessels in close proximity to the pumps, by which it is able to 
fetch the water from any distance (of course within the limits determined by the friction 
in the pipes), or from a depth not exceeding 29 feet, and to force it any required 
height or distance. 
The author then, by the aid of diagrams, explained these several machines, 
