72,020.-CORN SHELLER.-Joseph Gould, Grinnell, Iowa.

I claim the roller, C, having its teeth placed upon its face in the manner herein described, and placed within the box between the stationary board, b, and adjustable board, F, by means of its curved springs or oblong slot, when used in combination with metallic inclined plane, E, and hopper, B, with false bottom, as herein set forth.

72,021.-KNIFE CLEANER.-Lewis Goulding, Medfield, assignor to himself and James E. Carpenter, Foxborough, Mass.

I claim, 1st, The combination in an implement for scouring knives, of the bar, B, with its adjustable pad, g, arranged for operation as and for the purposes herein shown and described.

2d, Also in combination with the board or tablet, A, the bar, B, provided with the scouring pad, g, and pivoted to such board, and operating with its upper surface, or upon an inclined bed formed thereon, essentially as herein set forth and explained.

3d, Also the combination with the bar, B, and its pad, of the knife bed and the enclosure for holding and receiving the scouring material, arranged relatively to each other and to the bar, B, as herein shown and set forth.

72,022.-FENCE POST.-David M. Graham, Evansville, Ind.

I claim, 1st, The construction of double portable fence posts, attached by metallic bevel clasps, with flanges, slots, and tongues, and secured by keys, substantially in the manner and for the purposes as herein described and shown.

2d, The adjustable anchors or braces attached by metallic eyes and key, and the combination of the feet of the posts and base, substantially in the manner and for the purposes as herein described.

72,023.-STEAM GAGE.-Albert S. Greene (assignor to John F. Olmsted), Washington, D.C.

I claim, 1st, The construction of a steam gage with two columns of mercury, A and F, communicating with each other at their lower extremities by means of the flexible diaphragms, c and d. and the solid double-headed lifter C, substantially in the manner and for the purpose as herein set forth.

2d, The solid double headed lifter, C, in combination with the flexible diaphragms, c and d, and the primary and secondary reservoirs, substantially in the manner and for the purpose as herein set forth.

3d, The transmission of the pressure of steam from one column to the other by means of a solid double headed lifter, in combination with the flexible diaphragms, c and d, substantially in the manner and for the purpose as herein set forth.

4th, Providing the primary reservoir, I, with the screw plunger, H, substantially in the manner and for the purpose as herein set forth.

72,024.-MACHINE FOR WALL BUILDING AND STUMP EXTRACTING.-Thomas S. Greenman, Mystic Bridge, assignor to George W. Packer, Jr., Mystic River, Conn.

I claim, 1st, The within described novel construction of a truss for a wall building machine, the same consisting in the pyramidal framing, A B B, the horizontal timbers, D D, uprights. E F, holding-down bolts G J, and inclined braces, I H, combined and arranged substantially as and for the purpose herein set forth.

2d, Also in such truss firmly securing the timbers, D D, to the pyramidal framing, A B B, by enlarging and bolting, or equivalent fastenings, at the points of contact, in addition to the truss work before described, substantially as and for the purpose herein specified.

3d, Also the diagonal arrangement of the holding-down bolts, G, at the front of my truss, the same being arranged relatively to the timbers, D, triangular frame, A B B, and their several connections, substantially in the manner and for the purpose herein set forth.

72,025.-WINDOW SCREEN.-A.W. Griffith, Roxbury, Mass.

I claim the roller cover, E, in combination with the removable screen, D, spring roller, C, sash, A, and window frame, as herein described for the purpose specified.

72,026.-FERTILIZER.-Wm.C. Grimes, Ladiesburg, Md.

I claim forming a fertilizer in the manner herein described, of the ingredients and proportions substantially as specified.

72,027.-CULTIVATOR.-John Gross and John C. Tunison, Decatur, Ill.

We claim, 1st, the arrangement and combined action of the two frames, so that when any permanent obstruction comes against any of the plows the frames will disconnect, and the back frame ride or move up on the front one and thus avoid breakage, substantially as described.

2d, Also a frictional spring hook upon the tongue or tongue frame, for catching or holding upon a cross bar of the rear frame so that the two frames will not disconnect until the pressure upon the plow or plows exceeds that for which the hook has been adjusted, substantially as described.

72,028.-HOSE SHIELD.-John A. Hasse, Philadelphia, Pa.

I claim the combination of the floor or footway, C, with the side pieces, b b, of a sectional hose bridge, constructed substantially as described.

72,029.-SKY ROCKET.-John W. Hadfield, Newtown, N.Y.

I claim the application of detachable wings to a sky rocket, through the medium of a collar or band, arranged so that the wings may be detached from the collar or band, or the latter detached from the rocket, substantially as shown and described.

72,030.-SKY ROCKET.-John W. Hadfield, East Williamsburg, N.Y.

I claim the attachment to a sky rocket of three or more sticks, at equal distances apart, substantially in the manner and for the purpose set forth.

72,031.-MACHINE FOR REFITTING CONICAL VALVE.-Chas. F. Hall, Brooklyn, N.Y.

I claim, last, A milling tool with one or more cutters attached to one or more arms or longitudinal sections of a cone, whether straight or oblique, whereby conical valves of different sizes may refitted, constructed substantially as shown and described.

2d, In combination therewith, the yielding center, C, substantially as described.

72,032.-COLLECTING OXIDE OF ZINC.-Geo.C. Hall, Brooklyn, N.Y.

I claim, 1st, A building, structure, or compartment, A, provided with openings, a, covered by screens, B, substantially as and for the purpose set forth,