I claim, 1st, The pivoted or jointed pointer, B, having a spring or equivalent weight attached, and arranged to operate in the manner substantially as and for the purpose set forth. 2d, The tube, A, provided with the slotted cap plate, b, and the nut, C, when used in connection with the pointer, for the purpose specified. 72,060.--ROOFING.--Orville Manly, Garrettsville, Ohio. I claim, 1st, a roof composed of tiles, a and b, having spaces, S, between them for a water tight cement, substantially as shown and described, and for the purposes set forth. 2d, The saturated tiles, a, and the saturated tiles, b, substantially as shown and described, and for the purposes set forth. 3d, The lower or outer row of tiles, b, when laid together, forming an eaves trough, substantially as shown and described, and for the purpose set forth. 72,061.--REFINING CAST IRON AND CONVERTING IT INTO STEEL.--Emile Martin and Pierre E. Martin, Paris, France. We claim the method and means for refining and converting cast iron into cast steel and other metals, substantially as herein shown and described. 72,062.--STRAW CUTTER.--John W. Mauzy, Richmond, and James Hughes, Cambridge, Ind., assignor to James Hughes. We claim, 1st, The combination of the side pieces, D D, constructed as described, containing the bearings for the cutting mechanism, the shearing bar, B, with square faces, and the spirally bladed knife, C, arranged substantially as described. 2d, The combination of the perforated rollers, E, ratchet wheels, F, pawls, H1, i add R, adjustable oscillating arm, G1, eccentric rod, L, and eccentric, M, respectively, constructed and arranged substantially as set forth. 3d, The arrangement of the cap, G, rollers, E E, covers, Q, sides pieces, D D, knife, C, and the driving and the feed mechanism, constructed and combined substantially as set forth. 4th, The feed rollers E, when constructed from sheet metal, and punched from the inside, forming projections as shown, for feeding the straw to the knife. 5th, The metallic side pieces, D D, constructed as described, in combination with the bar, B, knife, C, feed rollers, E E, arranged substantially as set forth. 6th, The combination of the eccentric, M, on the knife shaft, eccentric rod, L, and oscillating arm, G1, when the latter are so arranged as to regulate the cut by adjusting the point of attachment, substantially in the manner set forth. 72,063.--CONVERTIBLE SHOT GUN AND RIFLE.--Samuel McCulloch, Yellow Springs, Ohio. I claim, 1st, The removable barrel, C, constructed with external collars, c, and secured within a shot gun barrel, A, by a screw, D, substantially as and for the purposes set forth. 2d, Also the plug, F, for the purposes set forth. 72,064.--DERRICK.--D. J. McDonald, Gold Hill, Nevada. I claim, 1st, The derrick standard, L, and frame, K, fitted in the derrick frame, J, and arranged as shown, for the ready adjustment of the standard, L.