71,898.--BOOTS AND SHOES.--Charles Mole, Pembroke Terrace, Regent's Park, London, England. I claim the manufacture of a movable boot heel in two parts, to be adjusted in different positions by means of a single central projection taking into a single slot hole or countersunk part, and secured in position by means of a central screw or pin, whether such projection and hole or countersunk part be square or many sided, and no matter what the shape of these sides, so that the shape of the projection and that of the hole which is to receive it be identical, the whole substantially as hereinbefore described and illustrated on the annexed sheet of drawing. 71,899.--WATER COOLER AND REFRIGERTOR.--Alfred Murden and Henry L. Cooper (assignors to themselves and Fiancis Warner), New Haven, Conn. We claim the arrangement of the cylinder, A, and outer cylinder, C, so as to form a water space, D, and combined with covers, E and G, so as to form a chamber, F, above the water space, D and ice cylinder, A, so that the cover, E, forms the bottom of and the cover, G, the top of the said chamber, in the manner and for the purpose herein set forth. 71,900.--CONSTRUCTION OF STAMPED SHEET METAL KETTLES.--Frederic G. Niedringhaus and William F. Niedringhaus, St. Louis, Mo. We claim the spout of a kettle when formed by pressure from the bottom and top plate of the kettle, when constructed substantially as shown and specified. 71,901.--BREAST STRAP SLIDE.--O.B. North (assignor to O.B. North & Co.), New Haven, Conn. I claim, 1st, The arrangement of the hinged tongue, E, upon the plate, A, so as to cover the ring, substantially in the manner herein set forth. 2d, Constructing the hook or projection, D, upon the inside of the plate, by forming an opening, d, through the plate, substantially as and for the purpose herein set forth. 71,902.--SNOW PLOW.--Abel Nutting, Quincy, Mass I claim the rotary plow, arranged to operate substantially as set forth. Also, in combination with such a plow, inclines, or shares, fixed, with respect to the frame by which they are supported, substantially as described. 71,903.--STEAM GENERATOR.--Isaac R. Oakford, Philadelphia. Pa. I claim a steam generator, composed of a series of cylindrical boilers, of round ends, provided with openings for steam and water, and arranged in a vertical and inclined position, in the manner and for the purpose above set forth and described. 71,904.--CASTER FOR FURNITURE.--P.B. O'Brien and Wm. E. Sparks, New Haven, Conn., assignors to P.B. O'Brien. We claim the arrangement of the spring, a, in the spindle, B, and combined with the socket, C, so as to operate in the manner substantially as described. 71,905.--RAILWAY FROG.--Staats N. Park, Bloomsbury, N.J.