Mounting small insects for the microscope, such as parasites and acari from birds, beetles, etc., may be performed by placing the live insect on the inside of a sheet of tolerably good note paper, folded, and when in the act of running, closing the paper and pressing it tightly in a book. By this means the legs and antennse may be nicely extended, all tho expressed moisture absorbed by the paper, and the skin left apparently unbroken. It should be allowed to remain in tho book about two days, when it may be carefully removed from the paper, put in the turpentine bath, and afterward mounted in balsam in the usual way. Turpentine as a Remedy for Lockjaw.—The Medical and Surgical Beporter notices the communication of one of our correspondents in regard to turpentine as a remedy for lockjaw. It says it is one of the numerous remedies long known to physicians, and that its efficacy cannot be relied upon with certainty. The fact is that lockjaw is one of the most obstinate complaints physicians are called upon to treat, and no remedy has been yet found which certainly masters it. The Calabar bean has been lately tried with considerable success, administered hypodermically. This remedy is not, however, a new one, and has failed in many instances. We hope no reader will fail to peruse the article entitled " Patents or No Patents," published in another column. They will find therein much that is instructive as well as amusing, and will become convinced of three facts: First, that English workingmen are not such asses as Sir Roundell Palmer and Mr. Mcfie evidently took them to be; second, that the patent laws of that country are not likely to be repealed; and, third, that the American patent laws are, as a whole, superior to those of England, if not to those of any other countrv on the face of the earth. The poor children of Philadelphia, says the Ledger, are largely interested in tho peach kernel trade. They extract the kernels from the " stone," put them upon strings, or threads, in bunches numbering from one to five hundred, and sell them to the druggists. The price is one cent a hundred, and an industrious gleaner might, possibly, collect, crack, and string 500 in a day; so that those urchins in the trade are not likely to be called on to pay income tax. The kernels aroused, principally, for making alcoholic "bitters," and are chiefly valuable for the hydrocianic acid to be procured from them. Kennedy's Patent Sadiron.—The inventor of the sadiron, illustrated and described on page 116, current volume, desires us to state that the bracket and pulley arrangement for taking up the slack in the flexible gas tube, is only necessary on very large work. For ordinary domestic use it may be dispensed with, the simple flexible tube of the proper length affording ample play for the iron. " Cosmos" says that while some drainage works were being executed at Yielsalm, province of Liege, Belgium, the workmen found, at no great depth under the surface, a piece of na tive copper, weighing about four and a half pounds, and partly hollow inside exhibiting crystals. This discovery led to some further research, which resulted in finding some veins of malachite. Unless glass is carefully annealed and thoroughly well made it is apt to cool unevenly ; this does not affect the transparency or its appearance, but is discoverable on examination by polarized light. Stereotyping by the paper-machie process was invented by Genaux, of Paris, in 1829. 152 Improved Machine for Borings and Mortising Blind Stiles. This machine, as illustrated in the accompanying engraving, embraces all the features of the machine for which a patent was granted to Leonard Worcester, July 5,1859, together with several other valuable improvements for which a patent is now pending, and which, it is claimed, render it the most efficient machine for the kind of work it is designed to execute on all kinds of stock now manufactured. Machines have been made for some time that would mortise soft lumber free of knots and shakes, but none before this have had the necessary combination for both boring for revolving slats, or mortising for fixed slats, in all kinds of stock, hard or soft, clean stock or knotty and shaky timber, and f or leaving the mortises free from chips ready for the insertion of the slats. This machine is entirely automatic in its operations, either boring round holes for the pivots ol revolving slats, or mortising tho recesses for the ends of fixed slats. In cutting these recesses it can be adjusted to make them at any required angle. The cutting of the recesses is done by means of a recip rocatory or traversing burr or bit, which, we have already said, can be used in any obstinate description of wood, where ordinary machine chisels fail. It will also make the mortises any length from a round hole up to two and one half inches, and of any width or depth required in a window blind. All the operator has to do is to put in the stiles and set the machine in motion, when it does its work, and, having done it, stops. It does the work on both stiles at once at the rate of sixty mortises per minute. One man, the inventor asserts, can set out and mortise from 125 to 150 pairs of blinds per day with one machine. The bit or burr is a very simple device, not liable to be broken and easily kept sharp. It costs only ten cents. The machine is very simple in construction and is made wholly of iron and steel. It is thoroughly built and easily set up and put in operation, and is not liable to get out oforder. Not more than one half a horse power is required to run it. It is peculiarly adapted to the work on car blinds, where the mortises are less than one eighth inch in width, and, consequently, difficult to make with chisels of ordinary construction. Agents for its introduction throughout the United States are wanted. For further particulars address Martin Buck, agent, Lebanon, N. H. Improved Cork Extractor. Our engraving shows a simple and powerful implement for extracting corks from bottles, patented Jan. 14,1868, by James Morton, of Philadelphia. It consists of three bars pivoted together, which, together with the corkscrew constitute the entire apparatus. One of the bars has a socket or cap at its lower end, which is placed on and around the nose of the bottle. Near the upper end of this first post or bar is pivoted the end of the second bar, near the middle of which the third bar is pivoted. The second and third bars have handles at their outer ends, and at the inner end of the third bar is a hook. This hook engages with the corkscrew in the manner delineated in the engraving, and by forcing the handles together or pressing them downward, the cork can be easily extracted. The instrument is equally adapted to extracting corks on which rings or hooks are already formed so that no corkscrew is needed. For further particulars address James Morton, 912 South Eighth street, Philadelphia, Pa. A Reserved Testimonial. A few days since Moses G. Farmer, Esq., of Salem, Mass., was presented with a sardius, or red carnelian intaglio, of Sir Isaac Newton, estimated to be about 200 years old, by S. W. Dewey, of this city, in consideration of his electrical investigations and inventions. This latter gentleman, in presenting it, stated that since being its proprietor he had often thought he would present it to Professor Morse, in token of the great good he had conferred upon the human family by his telegraph inventions, but lately he had become convinced that Mr. Farmer, the inventor of the fire-alarm telegraph and the American compound telegraph wire, was eminently deserving of it. Mr. Dewey received the intaglio from a Mr. Bishop, late of New York, who received it from his father, who was a diamond setter to the sovereigns ot England, France, Spain, and Portugal, and the records held by him of the j ewels he had in his possession were such as to leave no doubt as to the antiquity of the gift and the probability that it was taken from life.—Boston Traveler. Professor Tyndall. The following agreeable personal sketch of Prof. Tyndall, by a correspondent of the New York Tribune will be perused with interest by our readers who have so often seen his name in these pages: " One of the most agreeable features of my brief visit in London was the acquaintance, which, through the kindness of friends at home, I was enabled to make with several eminent scientific men whose names ate cherished with equal lienor on both sides of the Atlantic. Soon after my arrival I called on Prof. Tyndall at his rooms in the Royal Institution, a, learned society, which, from the commencement of the present century, has exerted a marked infiuence on the devel- opment and popular difi*usion of scientific knowledge in England. Its history is illustrated by some of the most important discoveries of the age in the natural sciences, including the labors of Count Rumford, Sir Humphry Davy, Faraday, and Prof. Tyndall himself, whose enthusiastic, poetical temperament and remarkable gifts of expression, combined with the habit of rigid scientific analysis, have contributed largely to create and gratify the taste for popular science, which prevails among a very considerable portion ot the cultivated classes in English society. " Prof. Tyndall has all the ardor of a reformer, without any tendency to vague and rash speculations. Recognizing what- ever is valuable in the researches of a former age, he extends a gracious hospitality to new suggestions. With a noble pride in his favorite branches of inquiry, he is not restricted to an exclusive range of research, but extends his intellectual vision over a wide field of observation. The English, as a rule, are inclined to be suspicious of a man who ventures beyond a special walk in the pursuit of knowledge. They have but little sympathy with the catholic taste which embraces a variety of objects, and is equally at home in the researches of science, the speculations of philosophy, the delights of poetry, and the graces of elegant literature. But a signal exception to this trait is presented by Prof. Tyndall. His mind is singularly comprehensive in its tendencies, and betrays a versatility of aptitude, and a reach of cultiva tion, which are rarely found in union with conspicious eminence in purely scientific pursuits. In his own special domain, his reputation is fixed. His expositions of the theory of heat and light and sound, and of some of the more interesting Alpine phenomena, are acknowledged to be master pieces ol popular statement, to which few parallels can be found in the records of modern science. But in addition to this he pos-sesses a rare power of eloquence, and manifold attainments in difi'erent departments of learning. I do not know that he has ever written poetry, but he is certainly a poet in the fire of his imagination, and in his love for all the forms of natural beauty. Nor has he disdained to make himself familiar with the leading metaphysical theories of the past age, in spite of the disrepute and comparative obscurity into which that science has been thrown by the brilliant achievements of physical research. I noticed with pleasure in his conversation his allusions to Fichte, Goethe, R. W. Emerson, Henry Heine, and other superior lights of the literary world, showing an appreciation of their writings, which could only have been the fruit of familiar personal studies. Besides the impression produced on a stranger by his genius and learning, I may be permitted to say, that I have met with few men of more attractive manners. His mental activity gives an air of intensity to his expression, though without a trace of vehemence, or an eager passion for utterance. In his movements he is singularly alert, gliding through the streets with the rapidity and noiselessness 'of an arrow, paying little attention to external objects, and if you are his companion, requiring on your part, a nimble step and a watchful eye not to lose sight of him. " Though overfiowing with thought, which streams from his brain, as from a capacious reservoir, while his words 'trip around as airy servitors,' he is one of the best of listeners, never assuming an undue share of the talk, and lending an attentive and patient ear to the common currency of conversation, without demanding of men the language of the gods. The singular kindness of his bearing, I a,m sure, must proceed from a kind and generous heart. With ao pretense of sympathy, and no uncalled-for demonstrations 3f interest, his name will certainly be set down by the recording angel, as * one who loves his fellow-men.' "