primings, a section being shewn in fig. 21, in which figure, e, represents a small cavity, formed in one end of the primer, to contain the detonating prime.

The magazine R, has its open end placed close to the vertical slider N, and when the latter is depressed or slidden down, by the action of the thumb of the sportsman, upon the projecting part м, it will receive a primer, in a semi-circular cap, formed upon the upper end of the slider; and which, upon allowing the slider to ascend, will be raised with it, and lodged between it and another semicircular cap, made in the lock-plate H, and will be retained there by the action of the lever I, and its spring K, until it is drawn rapidly and forcibly against the nipple &, by the action of the main-spring of the gun-lock, when, as aforesaid, the detonating prime will be exploded, and the gun discharged. The metallic priming, thus exploded, will drop out through a side opening f, when the lock is at the half-cock. Another primer will of course be received upon the upper end of the vertical slider N, every time it is depressed, until the whole contents of the magazine are expended; the metal cylinder c, will then project beyond the tube R, and prevent the vertical slider N, from rising.

I do not intend hereby to claim, as my invention, any of the individual parts herein shewn and described, but only their combinations and applications to the above purposes; and particularly the application of conical detonating primers directly to the breeches of fire-arms, either in conical metal caps, screwed into the breeches, or formed in the breeches themselves; and also the arrangement for discharging fire-arms, by means of small metallic detonating primers contained in a magazine, and supplied, one at a time, as required.—[Inrolled in the Rolls Chapel Office, September, 1834.]

part of the machine during the process of making d which would otherwise become incorporated in , and thereby occasion marks and blemishes from rusting.

cond part of the invention, has for its object, the 1 and regular distribution of the pulp over the the perforated cylinder, on which the paper is

er machines, of the present construction, the as it revolves in the pulp vat, has a tendency to bres of the pulp in a lateral direction,—this has nd to be disadvantageous; and, therefore, the propose to lay the fibres, either in a transverse al direction, as well as in a lateral one, or rather t the fibres of the pulp from laying regularly in direction.

st part of the invention, or mode of extracting parcon or steel from the pulp, is effected by placing a f strong magnets at the bottom of a trough, and ne paper pulp to flow over them; all particles of on will thereby become arrested, and prevented bining with the sheet of paper.

cond part consists of an apparatus, which has a

tendency to arrest the pulp in its forward motion, and cause it to deposit the fibres, either transversely or diagonally. This apparatus is a fluted shield, partially enveloping the pulp cylinder, and between which the pulp is obliged to pass. The shield, being fluted like a scollop shell, partially arrests the pulp, and causes it to be deposited in a diagonal or transverse direction, as well as the lateral one, which is effected by the revolution of the cylinder. [Inrolled in the Inrolment Office, January, 1836.]

To THOMAS CLARK, and CHARLES CLARK, of Wolverhampton, in the county of Stafford, ironmongers, and co-partners, for an invention for glazing and enamelling cast-iron, hollow-ware, and other metallic substances.-[Sealed May 25th, 1839.]

THIS invention is for a method of enamelling or coating the internal surface of iron pots or saucepans, in such a manner as shall prevent the enamel from cracking or splitting off, from the effects of the heat arising from a fire upon which the pot or saucepan may be placed.

The first part of the operation is cleaning, or preparing the internal surface of the iron vessel, in order to receive the enamel coating or covering, and consists in submitting the vessel to the action of an acid solution of from 16 to 20 gallons of water, acidulated in such a manner, by sulphuric acid, so as to be just perceptible to the taste; the vessel is to remain immersed in the acid solution for three or four hours, after which, it must be well scoured with fine sand in clean spring water; and after the vessel has been boiled in pure water for a short time, the first composition or ground may be applied.

VOL. XVII.

I

This composition consists of the under-mentioned ingredients, mixed in the following proportions: One hundred pounds weight of flint, calcined and ground fine to powder; add thereto, fifty pounds weight of borax, calcined and finely ground with the above; fuse the mixture and let it cool gradually; then take forty pounds weight of this product, and with five pounds of potters' clay, grind it well in water until it arrives at such a consistency as will admit of its being laid on the vessel; this is effected by washing the internal surface thereof with the composition until it has a coating of about a sixteenth of an inch in thickness; when this coating becomes set, which it will do in about five or ten minutes, add the second composition, consisting of one hundred and twenty-five pounds of white glass, which must have been manufactured without lead, twenty-five pounds of borax, and twenty pounds of soda; pulverize the above together, and vitrify them; when cooled, grind the product in water, and afterwards dry it. Take forty-five pounds of this mixture, and add thereto, one pound of soda; mix them together in hot water, and when dry, pound it and sift it finely over the internal surface of the vessel, previously covered with the first coating or composition. This second composition is for the purpose of glazing the first; and when the vessel is prepared in the manner above-mentioned, it must be put into an oven or kiln, and baked at the temperature of about 2120 Fahrenheit.

The patentees claim, as their invention, coating or covering cast-iron, in the manner above described.—[Inrolled in the Inrolment Office, November, 1839.]

TO JOHN ALEXANDER PHILIP DE VAL MARINO, of Margaret-street, Cavendish-square, in the county of Middlesex, Esquire, for his invention of certain improvements in the manufacture of gas, and in the apparatus employed for consuming gas, for the purposes of producing light.-[Sealed 22nd June, 1839.]

THIS invention is divided into two parts, and relates, firstly, to an improved method of manufacturing gas, for the purposes of light, from coal or other tar, and oils, and other fatty substances, in combination with water; and, secondly, an improved construction of burner for consuming the gas for the purposes of light.

The first part of the invention has for its object a more perfect decomposition of tar, oils, and other fatty matters, and water, by means of which a more perfect combination of the gases evolved, and consequently a more beneficial result, will be obtained. The nature of the apparatus and process is such, that the tar, oil, or other fatty matters employed, is completely decomposed by being exposed to highly heated surfaces of charcoal or coke, and the water is also completely decomposed in suitable vessels.

The products arising from the decomposition of the water, are brought into a highly heated retort or other vessel, filled with coke or charcoal, wherein the process of decomposing the tar, or oils, is going on, and such is the chemical action and re-action of the gases, that the carbon contained in the tar, oils, or fatty matters, becomes fully saturated, and the whole or very nearly the whole of the carbon is thereby obtained in the state of carburetted hydrogen gas.

It is well known that when different oils or tars are decomposed, they evolve different proportions of hydrogen,