Art and Taste—The artist who can paint a good hand is fit to achieve any work requiring care, skill, and taste; while, on the other hand, it makes no matter what the kind of an imagination a painter has, though it beasgor-geous as that of Fuseli, if he cannot draw correctly, or if he does not paint carefully—that is, bestowing all his attention upon one part, such as the face, and exhibiting gross carelessness about the other parts—he is sure to fail, and can never rise to the first rank of artists. In painting a full-length portrait, many suppose that the face is the only part which should be painted true to life. It is also true that many artists can paint a face well, who cannot paint a hand or a loot. Hence it is that we often see portraits of persons that we know, with the bodies, hands, and feet of people we never saw, stuck on to them. It is more difficult, we suppose, to paint a hand and a foot than a face; or, being more familiar with the hand, every person is better qualified to exercise the office of a critic with respect to its true delineation on the canvas. Be that as it may : we never were more strongly impressed with carelessness in respect to the execution of female hands, by any artist, than those of the Empress of France, on the first page of the Imperial Marriage Supplement oftho London Illustrated News. The artist has drawn a very good figure, and a tolerable face,—but such hands, especially the left hand why it is not a hand at all, but looks like the huge paw of a Spanish wolf-dog. We hope these few words will not be lost on our artists :—be careful of every part of your pictures. Parkers Water Wheel.—We have received a letter from J. Sloan, of Sloans Mills, Ky., directing our attention to the error of one figure in Vol. 6, page 272, Scientific American, where an experimental wheel of Mr. Parkers of 10 inches diameter, is stated to have had six discharging apertures of 9 square inches aggregate section. It should have been 6 inches, instead of 9. He has a copy of 186 experiments made by Mr. Parker, and he has made many himself and has found that the best effect is produced when the area of inlet is the same as that of the wheel. He asserts that the articles on Water Wheels, in Vol. 6 are valuable and recognized as standard authority, and that every error, however small, should be carefully noted. This is true : those millwrights who have proportioned their wheels, with an inlet of 10 square inches to 9 of the discharge areas, will therefore get a better effect by narrowing the inlet area to equal those of the wheel. Carpenters—We have received a letter from L. M. Parker, of Shrewsbury, Mass., on the subject of the condition of the Carpenters Trade. He served an apprenticeship at his business, learned draughting, and was indentured to learn the trade complete. He has noticed a great decline in the learning of the trade thoroughly, hence there is too great a quantity of wretched carpenter work to be seen in most of the houses erected at the present day. He attributes much of this evil to the general appetite for cheap work, and a great deal of it to the preference given to that made by men incapable of producing good work. Mere botches are now found to be contractors—men who can neither design nor execute, but they do their work cheap, and produce a great quantity of it. This is too true, —the general carpenter work executed in this city is exceedingly poor, and a discredit, unjustly, to the trade, which comprises many thoroughly skilled and ingenious men. The India Rubueii Case—The Decision. —The Commissioner of Patents, S. H. Hodges, gave his decision on the application for an extension of Haywards patent, on the 23d inst. His conclusions were, that he must dismiss the application for the extension of the patent prayed for by Goodyear and Hayward, the applicant having, with a full knowledge of the value of the patent, sold it for the valuation fixed by himself, and therefore that there is no good reason, either from the ingenuity of the invention or its utility to the public, to warrant the extension of the patent for seven years farther. We cannot see what other decision the Commissioner could have made ; it is strictly according to law, as noticed by us recently, on page 181, when discussing this case. The objections against the extension were made in writing and read in his hearing. The Ether Case in the Senate.—Mr. Walker, from the Select Committee to which were referred memorials from the claimants of etherization, has reported as follows:—that the credit and honor of the discovery belongs to one of the following-named persons, all ci-zens of the United States, viz., W.T. G. Morton Horace Wells, or Charles T. Jackson ; but, as to the particular one to whom the discovery should be awarded, the testimony before the committee is not sufficiently clear, and they think the point should not be settled by Congress without a judicial inquiry. The committee has no hesitancy in saying that to the man who has bestowed this boon upon mankind, when he shall certainly be made known, the highest honor and reward are due compatible with the institutions of the country to bestow. The discovery is eminently meritorious, and its use by the Government of vast and incalculable value and benefit, they recommend to the favorable consideration of the Senate an amendment to the army appropriation bill, giving $100,000, when a decree of the court of the northern district of New York is obtained, showing the person entitled to be regarded as the discoverer. This resolution has been passed, and we hope it will settle this controversy for ever, by the examination of testimony adduced by all the claimants. The business of putting provisions in hermetically sealed cans has become an important one in Portland, Me. List of Patent Claims Issued from the United States Patent Office FOR THE WEEK ENDING FEBRUARY 22, 1853 SEPARATING ORES OK OTHER SUBSTANCES—By Hezekiah Bradford & Eliaha Fitzgerald, of New York City: We claim giving to the reciprocating pin the peculiar motion described, by the means described. Also, giving the back movement to the said pan, in a less period of time than the forward movement by means of a crank or cranks, whose axis of motion is below or above the plane of motion of the rear end of said pan, or by equivalent means, as described, and for the purpose specified. Also, in combination with a pan, having the motions, or either of the motions, substantially such at specified, and on which the ore, &c , mixed in water, is supplied at some point towards the middle or back, the employment of a current or currents of water descending the inclined or curved surface of the said pan, as specified. Abo, making the rear end of the said pan with an inclination or curve upwards, as set forth. Also, making the said pan, as specified, with apertures back of the place where the substances to be separated are applied, for the purpose Bet forth. Finally, making the front and rear ends, or either, of the pan having a vibratory motion, with a gradual curve downwards, as specified, when the same is employed, in combination with currentaof water, as specified. G-as Meters—By A. A. Croll, of London, Eng.: I claim the mode of arranging movable partitions, or plates, so that the flexible material at the circumference of the plates, shall not be bent but in one direction, asset forth. Also the arrangement and combination of the arms with the valves and movable plates, of a dry metre, as set forth. Sbwino Machines—By W. A, Johnson, of Grean-ville, Mass, (assignor to W. 0 Bates, of Westfleld, Mass.): I claim the making; of the double loop stitch, having the loops upon one side of the cloth, by means of two needles combined and operating as described. Also, the making- a seam, or uniting two pieces of cloth, by means of the double loop stitch, consisting of a plain stitch from a single thread on oneside, and on the other, of a continuous chain, formed of a succession of double loops from the threads. Scythe Tastkninos—By Alpheus Kimball, of Pitchburgh. Mass.: I claim the method of securing the blade of the scythe to the snath, by passing its shank through the end of the stationary metal cap, and securing it by means of the upward pressure of the screw, in combination with the elaff and bush piece, constructed and operating as described. Suspending, Lowering., and Libebatino Ships Boats—By Win. S. Laoon, of Great Yarmouth, Eng. Patented in Bngland Feb. 23,1852 : I do not confine myself to the precise arrangement of apparatus described for carrying out my invention; but I claim suspending ships boats by having the chains or rope3 so connected with drums or barrels, substantially as specified, that the two ends of the boat shall descend together, and with equal or nearly equal velocity, and so that the chains or ropes shall be free to disengage themselves from thft barrels, in combination withthe mode of controlling the turning of the barrels, by the weight of the boat, &c, as specified. Mortising Machines—By James Moreland, of Adrian, Mich : I claimthecombination of the cross bar oa the cross head, with the projecting dog on the movable way, for the purpose of withdrawing the chisel from the wood, on tbe back motion of the cross head, as set forth. Cut-off Motion fos Looms—-By A. B. Tayler, of Mystic, Conn., & Stephen Wilson Jr., of Westerly, B. I : We do not claim the roller against the warp, by which the position of the weight ia regulated : neither do we claim the ratchet wheBl and worm pinion, moved by a pawl or click, from the lay, as these have before been used. What we claim is, effecting and regulating the let-off motion by the variable counterpoise lever, in combination with the sliding worm pinion, when said worm pinion is acted on by the yarn beam through a direct strain communicated to it by the tension of tbe warp, the whole arranged and combined as specified. Turning Ibrequlab Forms—By Lauren Ward (admr. of Richard Ward, deceased), J. B. Hubbell & H. C. Hubbellj of Naugatuck, Conn.: We are aware that machines have been made for turning irregular shapes, by means of sliding centre grooves, guides, patterns, cams, &c, and that cutters have been so formed and arranged as to assist the cams, &c, in giving the shape to the article, we therefore do not claim either of these, as such, as our own invention, but we claim the use of a cutter wheel for turning irregular forms, the cutters being so arranged that the pattern may be disclosed in reverse, on its surface, when combined with the feed motion described, ho that ia turning said cutter wheel, the desired irregular shape will be given to the article, without usiiig guides or patterns, when the whole is combined and made to operate as described. DESIGN. Cradle—By Alex. Edmunds, of Mount Pulaski, Ill.