NEW SERIE •• ] IMPROVED TYPE COMPOSING AND DISTRIBUTING MACHINE. upper ends of which latter the key bars, 70, are pivoted. These key bars are provided with tappets, 32, 33, at tached to their bodies so as to be above the plates, 23, of a rotating type bar driver, and witl� a tappet, 34, that is carried by a curved arm, 35, so as to be below the plates, 23, of the same type bar driver. This t.ype bar driver consists of suitable heads at tached to a carrying shaft, 47, and provided with a number

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... f angularly arranged plates, 23, and it is con' stantly rotated by means of a pulley, 54. The key bars are capal:;lle of b&ing moved vertically as well all hori zontally, and when carried downward their tappet, 32, © 1887 SCIENTIFIC AMERICAN, INC, [JULY 23, 1887· will be engaged by one of the revolv ing plates, 23, which will thus move the depressed key bar forward and carry its tappets, 33 and 34, into their foremost position. When the key bar is thrown so far forward that the plate, 23, which propelled it passes off from the tappet, 23, it will have brou ght its tappet, 33, into a position to have its rear face engaged by another of. the plates, 23, which plate, in moving over the inclined rear face of said tappet, 33, presses the same upward and raises the key bar to which it is attached, thus lifting the tappet, 34, high enough to: be engaged by one of the plates, 23, which will then, by means of the arm, 35, carry. the type bar back to its rearward position, when it will be held by its sustaining spring in the raised position shown in Fig. 3. Each of these key bars has its front end guided in a vertical slot in the plate, 41. and the division plate, 42, of the key board frame, and it carries .at its front end a small cross stud that will pass through a slot at the front end of the division plate, 42, when the key bar is pressed downward and forllls a riding guide bearing against the under side of the division plate, 42, as the key b:lr is carried inwa�d. At its rear end this division plate has another slot that permits the upward passage of the stud, 43, and conse queutly allows the kflY bar to rise at the end of its rearward stroke, so that it lllay be moved forward with its stud, 43, riding upon the top of said division plate. Each key bar is Imrmounted by a key, 36, which keys are held in vertical guide slots in the top plate, 38, of the key board frame. and so as to rest upon the upper surface of the key bars. When a key is depressed, it forces a key bar downward, thus bringing its tappet, 32, into a position to be engag \ld ,by QJ16 Qf. tl1!l.,l?lat�!!1 �'l '., t��40t in the front end of the dIVIsion pla.te causing the stud, 43, not to obstruct such movement. When a key har, 70, is thus moved downward, a plate, 23, engages its tappet, 32, and forces the bar rearward by a positive movement. The stud, 43, then bears against the un(ler face of the division plate, 42, and with it acting as a guide, holding the key down, the tappet, 32, is in en gagement with the said plate. The rearward or iuward movement of the key bar moves the lever, 69, and rocks the bell crank, 67, the latter forcing a type ejector, 6, outward, and causing it to expel a type from its type channel. The type thus ejected is received upon the rotating carrying table, 30, and is carried around with its face fore most until it reaches the throat, 3, through which it is propelled on to a type conveying belt, 25. running over pulleys, 26, 27, which is arranged to travel with its edge in tha saltJe plane as that of the table, 30. This belt travels at a speed slower than that of the carrying table, and conveys the type to an inclined guiding chute, 28, whence it is conveyed to the line forming mechanislll with a momentum that will not call"e its face to be injured. The detailed figure illustrates the type distributing mechanism, which is very simple and has already been sufficiently" described. From the foregoing description the great ingenuity of this machine will be evident. It appears to have been very successfully introduced in the United States, where its capacity for setting and distributing is equal to 12,000 ens per hour. The machine is made by the Thorne Machine COlllpany, Hartford, Conn. We are indebted to Engineering for our engravings and the foregoing particulars. • •••• Fluoride of N1tro�eu, The supposed compound was formed by passing an electric current from seven ferric chloride batteries through a concentrated solution of ammonium fluoride. After the lapse of a short time, sllveral drops, of oily consistence, were observed attached to the negative plate. On becoming connected with the positive, a thin gold wire, these drops exploded with violence. The compound is undoubteqly highly unstable, being at once decomposed in contact with glass, silica, or organic matter, thus rendering the analysis of the same one of considerable risk. Its explosive violence is even greater than the chloride of nitrogen, and it is also prone to spontaneous decomposition.-Ghem. News.