BARNARD AND JOY'S PATENT SELFROLLING MANGLE.

The engraving on our front page is a perspective view of an improved mangle patented some time ago by Messrs. Barnard and Joy, of Norwich, in which weighted rollers have been substituted successfully for the cumbrous travelling bed now in use. It is very compact, occupying not more than one-fourth the space of the ordinary clumsy machine; it has already been extensively used, and, we are informed, with equal, if not superior, efficacy to both the common, and Baker's patent, mangle.

In the view on our front page NNN is the framework of the machine; A, B and C are three rollers or cylinders; E is a cross rail at the bottom of the inachine, from which is suspended the weight F. K K are vertical grooves or slots in the upright posts of the framework N, in which the ends of the axis of the roller A are free to move up and down; M M are two other vertical slots in the upright posts, in which the ends of the cross rail E are also free to move up and down, DD are bars inFig. 2

Fig. 3

the upright posts N N. for the purpose of connecting the roller A with the cross rail E, and the weight F attached thereto. The form of one of these bars

is shewn more clearly at fig. 2; d being the hole through which the axis of the roller or cylinder A passes; XX a slot to allow of the free action of the a axes of the rollers or cylinders B and C, and e, the hole for receiving the end of the cross rail E. L L are slots in the upright posts of the framework, in which the ends of the axis of the middle roller B are free to move, but which slots form a segment of a circle described from the centre of the pinion H, instead of being vertical. The vertical slot K, and the curved slot L, are more clearly shewn in figure 3, which exhibits a portion of one of the posts N with the slots therein; the wheel G being removed. G is a wheel fixed to one end of the axis of the middle wheel B (outside of the frame

works into the teeth of the wheel G. C, which is the lowest of lowest of the three rollers is required to revolve at one fixed point of elevation only, and has therefore no such range of action provided for as in the cases of the rollers A and B. O is the table which carries the articles to be mangled or calendered; P, brackets supporting the table O, and projecting from the framework N. Fig. 4, is a section of the Fig. 4.

P

R

serted in grooves in the inner sides of

middle roller B, shewing the manner in which the mangle-cloth Z is attached to the roller B. A groove R is made along the whole length of the roller B, into which a rod P, of brass or other metal, is made to fit exactly. The end of the

mangle-cloth is sewn so as to form a loop or hem, and the rod P being passed through, it is placed in the groove RR; the one end of the rod being secured in a hole or socket, at one end of the roller B, and the other end of the rod with a screw at the other end of the roller. By this means the mangle-cloth is made to start true, and the trouble of adjusting the same avoided.

Before setting the machine to work, the linen, or other cloth Z is attached to the middle roller B, in the manner before mentioned, and brought over on table O, and on this cloth the articles to be mangled or calendered are laid; a winch I being now applied to the axis of the pinion H, and being turned, the roller B is made to revolve, the linen or other cloth Z, to wind itself together with the articles to be mangled or calendered placed thereon, upon the roller B, and the roller B, in consequence of the circular range of action given to it by the curved slots L L, to rise in these slots in proportion as its diameter is increased by the plies or laminations of the articles to be calendered or mangled, and of the linen or cloth Z, which by the counteraction of the rollers A and B, and the weight F, the articles which have been placed on the table O, and wound round the roller or cylinder B, are mangled or calendered to any degree ordinarily required.

FRENCH INVENTION OF GAS

LIGHTING.

The French are determined to lose no time in putting in their claims to a far greater share in the invention and introduction of improvements in the useful arts than the rest of the world has hitherto been willing to give them credit for. It is now held-in France as an established fact, that the steam-engine was brought to bear by Papin, although Newcomen and Watt are entitled to some consideration for their trouble in reviving it; and, now that Paris is, in some degree, lighted with gas instead of oil, it has been discovered that the brilliant novelty, which, like most brilliant novelties, has been hailed with enthusiasm by our volatile neighbours-is an emanation of Gallic genius! Henceforth, we dull islanders must hide our diminished heads!

The proofs of this startling position advanced by the French journalists are almost too ludicrous for belief. After detailing some of the earlier English experiments on coal-gas, and especially those of Bishop Watson, the account goes on to give a description of a portable lamp, invented by a Monsieur Lebon, in 1785, the flame of which was to be supported by the combustion of the gas obtained from wood. In this grand object the inventor failed,—and voila the origin of lighting the street and shops of London and Paris by means of carburetted hydrogen conveyed through miles of iron pipes!!

It is true that the account candidly acknowledges the claims of Mr. Murdoch, to the invention of the present system of gas-lighting, and enters into a history of his exertions. In this the Frenchman is for awhile lost sight of, only to re-appear in the greater brillancy. Murdoch, we are told, met with such difficulties in his attempts to light the Soho factory, as to begin to think of giving them up altogether. This was happily prevented by the liberal patronage of Messrs. Boulton and Watt, "seconded by the encouragement afforded by the reports which reached England of the experiments of M. Lebon! Risum teneatis, amici? We are gravely informed that Murdoch would have most probably given up the idea of applying coal-gas to the purposes of illumination on a large scale, and left the world to the comparative darkness of oil and candles, even after he had brought his invention towards perfection, had he not happened luckily to hear, just in the nick of time,

-what?-that some twenty years before, a certain Frenckman had made an unsuccessful attempt to light a table lamp with a different kind of gas!

On the strength of the probability of this occurrence, it is now proposed that the name of Lebon, shall be inscribed among those of Murdoch, Winsor, Clegg, and the other non-Frenchmen who have hitherto run away with the whole credit of introducing gas to the world. It is impossible to imagine a richer or more laughable specimen of that egregious national vanity which prompts our 'crosschannel friends, like the "French falconers" of Shakspeare, to" fly at every thing they see." We have never yet heard of their claiming the invention of