when one pair is slided away, the other pair will be so placed as to come into action if required.

Fig. 2, shows the means of moving the wipers. On the tube is formed a clutch, into which enters one end of the lever b, and it will be seen that if the lever b, be turned on its axis, it will force the tube which carries the wipers along the main shaft, and the tube is prevented from turning by means of a feather, which is well understood.

Having described the manner of combining the various parts according to my invention, and also the manner of their action, it will be evident that although I have described and shown the piston rod as being fixed vertically, the same may, in some instances, be used horizontally, or in a diagonal direction; and I would have it understood that I lay no claim to the various parts separately, of which the engine is composed, they being well known and in use; neither do I confine myself to the precise construction of the various parts as shown in the drawing, as the same may be, in some degree, varied.

What are shown and described I have found to answer, and conceive to be the best arrangement; but what I claim as my invention, is the peculiar arrangement or combina tion of the various parts of a steam engine, whereby the steam cylinder is caused to be actuated on a fixed hollow piston rod, such hollow piston rod serving as an induction as well as an eduction way for the steam to and from the steam cylinder.―[Inrolled in the Inrolment Office, September, 1832.]

Specification drawn by the Patentee.

To ROBERT JAMES HENDRIE, of Blossom-street, Shoreditch, in the county of Middlesex, dyer, for his invention of an economical mode of improving dyed silk.— [Sealed 3rd May, 1832.]

THE subject of invention claimed under this Patent applies solely to the cleansing of a peculiar kind of silk during the dyeing process.

Silk, which is to be dyed of the colour denominated by the Patentee Imperial or blue black Dounce, is dyed in the skein: that is, in bundles or hanks of threads,slightly twisted together. After the silk has, been immersed in the dyeing material, a considerable quantity of foul matters are found attached to its fibres, so that a great labour and time is requisite to beat out and wash the silk clean by hand. In order therefore to expedite the operation, and of course render it more economical, the Patentee has discovered that the hand labour may be advantageously superseded by the employment of machinery.

Any kind of washing machinery which will sufficiently beat out and cleanse the material, may be used for the purpose, but the ordinary fulling stocks, such as woollen clothiers commonly apply to washing and milling cloths, are proposed as most eligible. The skeins of silk are put into bags made of safe canvass, and when placed in the stock, a continued stream of clean water is allowed to run through the stock during the operation, for the purpose of cleansing the silk perfectly.

The claim of invention is the employment of stocks or other machinery of that kind instead of hand labour, for the washing of silk dyed in the skein of the colour called blue black Dounce.-Inrolled in the Inrolment Office, November, 1832.]

TO WILLIAM DAUBNEY HOLMES, of Saint John's Square, in the county of Middlesex, engineer, for his having invented or found out a new method of heating houses and other buildings, and of supplying heat to various manufactures, and other purposes.[Sealed 19th July, 1832.]

THE subject of this invention is simply the employment of heated oil, or any other liquid, the boiling point of which may be at a higher temperature than that of water, for the purpose of communicating heat by its circulation through a continuous range of pipes placed round a building, in the same way that water has been recently employed for warming rooms, manufactories, and hot houses.

It has been long known that oil, under the ordinary atmospheric pressure, will retain a very considerably greater quantity of heat than water before it passes into the state of vapour or steam. Taking advantage of this knowledge, Messrs. Severn, King, & Co. of Whitechapel, formerly surrounded their sugar pans with boiling oil as a heating medium, which mode of evaporating syrups they continued to practise until the unfortunate and memorable explosion of the oil, which, with its attendant conflagration, totally destroyed their premises.

The employment of heated oil, as proposed by the Patentee, is not confined to any particular shape or construction of apparatus, as its application to heating is claimed generally under every from in which a continuous current of the fluid can be obtained. But for the purpose of illustration only, the plan of an oven to be heated by a continuous range of pipes conducting heated oil, is appended to the Specification.

Plate V. fig. 8, represents the contrivance as it would appear in a horizontal or plan view; a, is the oven sur

rounded by a double casing b, b, b, b, which forms a chamber or vessel to be filled with oil; c, d, e, is a continuous range of pipes leading from the bottom part of the chamber b, at c, and delivering into the top part of the chamber b, at e. A vessel of oil is placed at ƒ, from which the pipes and the chamber may be filled, and g, is a valve to let off the air which may previously occupy the pipes.

In some convenient part of the range a furnace or heating stove is to be applied to the pipe, by which the temperature of the oil will be raised, and consequently from the levity it has then acquired, will flow up the ascending pipe and enter the chamber b, or the upper part e; then circulating round the chamber as shown by the arrows, it will give out its heat to the oven a, and being slightly reduced in temperature, will descend by its superior gravity, and pass off at c, through the continuous range of pipes d, d, d.

The oil becoming heated in its course through the range of tubes d, d, by the fire of the stove or furnace, it will by its increased temperature again pass up into the vessel at e; a continuous current of the heated fluid will then be produced, which will effectually heat the oven in passing round.

For the purposes of baking, the Patentee proposes to raise the temperature of the oil to 400° Farenheit, but for other purposes, of course the degree of heat required will depend upon particular circumstances: and the employment of oil as a heating medium affords the ready means of regulating the temperature to any degree that may be desired.-[Inrolled in the Inrolment Office, December,

1832.]

TO MILES BERRY, of Chancery Lane, in the parish of Saint Andrew Holborn, in the county of Middlesex, civil engineer, and mechanical draftsman, in consequence of a communication made to him by a certain foreigner residing abroad, for certain improvements in the construction of presses applicable to various purposes.-[Sealed 26th July, 1832.]

THESE improvements in the construction of presses applicable to various purposes, consist in the adaptation of rotary toggle joints, or jointed levers, placed upon a revolving shaft, which when brought into a right line, effect the pressure upon the article submitted to its operation.

This mechanism is applicable to various kinds of presses employed for making nails or rivets, heading screw-shafts, bolts, or pins, making buttons, coining money, striking dies upon metals, and embossing cards or paper, and other materials; the improvements consisting in obtaining the pressure by means of rotary arms with toggle joints, or jointed levers, in any kinds of presses to which the same may be applicable.

As the minute parts or details of the press must necessarily vary according to the description of press to which these improvements are to be adapted, and the kind of work intended to be performed, it is only necessary to describe a simple application of these improvements in a press which may be used for coining money, or stamping, or striking dies.

The several figures in the accompanying drawing (see Plate V.) and the following description will sufficiently explain the principles and action of the rotary toggle joints, or jointed levers, in producing the required pressure upon the article to be struck in the press.