At the Penn Mills, near Clarion, Pa., no less than 21,072 feet of boards was recently turned out in ten hours by a circular saw of 4! feet in diameter. The power employed is a steam engine of excellent workmanship, made made by N. Myers & Bro., of Clarion. It is of 16-inch bore, 20 inches stroke, and makes 150 revolutions per minute (500 feet velocity of piston). Two boilers, each 24 fe et long, are employed to generate steam; they are 42 inches in diameter, have two 16inch flues each, and the

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... uel used is sawdust and waste slabs. __ I ••• Safety CheDdcal IUatehee. A Frenchman, named M. A. Meunons, has secured a patent in England for an improve ment In lucifer matches, with a view to ob viate the risks of aceidental ignition. To at tain this end, the matches are firat cut by known means from cubes of wood, the cut being stopped at a short distance from the end of each cube, so as to leave the lower ex tremities adherent. The upper or ⅇ extremi ty of each packet of splints thus fo rmed, being coated Wjth wax or sulplinr, is dipped in one. of the following proparations : -Chlorate of potlLlh, two parts; pulverized charcoal, one part; umber, one part: or, chlorate-of po tass, sulphur and umber in .. equal parts, thoroughly mixed with glue. The opposite extremity or "cut" of each packet is then painted over with amorphous phosphorus blended with si�e, 80 that on separating the matches, the phosphorus is only found on the .top of each. The matches thus prepared are ignited by breaking off a small piece of the phosphorized end and rubbing it on the oppo site extremity covered with the inflammable preparation. .... New Boller AI .... m. This is an ingenious and simple device for the purpose of calling attention by a whistle, when the water falla to so Iowa level as to endanger the bursting of the boiler by the water falling below the tubes, the introduc tion of cold water then being very liable to produce an explosion. This little apparatus consists of a block ot metal, A, to which is attached a whistle, A'. D is the front plate ot the boiler, through which the invention is secured by the screw, B, and nut, o. ThrQugh the solid part, E, in side the boiler, a passage is bored, correspond ing with one in A, and this is flared out to form a valve seat on the inner surface of E, which is closed by a conical valve, c, upon the rod, lI, the valve being kept home by the pressure of the steam behind it. The other end of this rod passes through a piece, E', which is hinged by the pivot, e, to E, so that it can turn freely round, and by pressing against the nut, d, on the valve rod, b, bring out the valve, c, from its seat, and allow the steam to pass to the whistle, and call attention to the tact that the water is low. To the lower part of E' a long bar F is attached, having a hol low ball, G, at its end, which floats on the sur face of the water. As the water rises and falls in the boiler within proper and eafe limits, the ball rises and falls with the water, moving ·the piece, E', upon the pivot, e; this piece is' so shaped that the moment the water approaches the dangerous point, the weight of G and lever, H, is sufficient to force back E' upon its pil'ot, e, and pull the valve, c, from its seat, thus allowing the steam a free pas sage to the whistle, and it will continue so to do until more water is supplied to the boiler, or the defect in the pumpa, if there be ene, remedied. Much of the water used for boilers contains a great quantity of solid matter, and this is liable to be deposited around, c, and � titntifit �meritan+ alarms, bllt in this one it is provided against, by the addition of the screw, a, outside the boiler, 10 that when the stoker suspects that there is any matter collected at c , or at regu lar intervals, he can, by moving the screw, a, fo rce c back, and either grind it in its seat, or permit the steam to blow the solid mat .. r away. The ball and lever in the positions indicated by the dotted lines show the range which they have before operating the valve, Methocl of Prevantln. Seulckneae. MILLER'S BOILER ALARM. Of all the ills that human flesh is heir to, there is none so nauseating and thoroughly odiolu as seaaickness, and we have no doubt tha t all of our readers who have ever been af ficted with it, and again contemplate" going down to the sea in ships," will hail a prethe lowest position being that in which the ball allows steam to escape and produce a whistle. This most valuable device, which is also an ornament to a boiler, is the invention of Alex ander Miller, of Cleveland, Ohio, and was Bronson'. Beve l and Radial Square. .A ventive as a boon more highly prized than a princely diadem. An alleged preventive for seasickness, and illness arising &om similar causes, has recently been patented in England by an Italian residing in France, named P. Molinari, w hich con�ists in the use of a com position prepared in the fo llowing manner : First, soak in a pint and three-quarters of vinegar for about twelve hours, rue, ! oz.; ," --" '\ I turmeric, t oz.; green husks of walnuts, t