Other contrivances for the same purpose are described by Philippe de la Hire (Mem.
Contrivances of the most diverse constructions have been employed.
Specially arranged contrivances which tell us that the ground has been shaken are called seismoscopes or earthquake indicators.
Great improvements, however, have been effected in the design of open fireplaces, and many ingenious contrivances of this nature are now in the market which combine efficiency of heating with economy of fuel.
Organs which respond to the mechanical stimulus of contact are found to possess special contrivances in certain of their cells(I) sensitive spots, consisting of places here and there on the epidermal cells where the wall is thin and in close contact with protoplasmic projections.
Nature therefore has provided various contrivances by which their seeds are disseminated beyond the actual position they occupy.
When he visited Rome with Gunibald, king of the Burgundians, he took him to Boetius, who showed them, amongst other mechanical contrivances, a sun-dial and a water-clock.
There are various contrivances by which this may be done by a man standing clear of the cars, but often he must go in between their ends to reach the knuckle.
Amongst the earliest mechanical contrivances of Fraunhofer was a machine for polishing mathematically uniform spherical surfaces.
The time had come for deliberate reconstruction, for inquiring whether the existence of many admitted evils was, as it was said to be, unavoidable; for proving that the needs of society may be classified and provided for by contrivances which shall not clash --?
His assault seawards was made mainly on Achradina,1 but the city was defended by a numerous soldiery and by what seems to have been still more formidable, the ingenious contrivances of Archimedes, whose engines dealt havoc among the Roman ships, and frustrated the attack on the fortifications on the northern slopes of Epipolae (Liv.
or more, the chief ports of the Rhine are admirably constructed, and well equipped with modern contrivances for loading and unloading vessels.
In endeavouring to make a pan of less power do as much and as good work as one of greater power, they have imagined many ingenious mechanical contrivances, such as currents produced mechanically to promote evaporation and crystallization, feeding the pan from many points in order to spread the feed equally throughout the mass of sugar being cooked, and so on.
either (I) by the Mexican crusher or arrastra, in which the grinding is effected upon a bed of stone, over which heavy blocks of stone attached to cross arms are dragged by the rotation of the arms about a central spindle, or (2) by the Chilean mill or trapiche, also known as the edge-runner, where the grinding stones roll upon the floor, at the same time turning about a central upright - contrivances which are mainly used for the preparation of silver ores; but by far the largest proportion of the gold quartz of California, Australia and Africa is reduced by (3) the stamp mill, which is similar in principle to that used in Europe for the preparation of tin and other ores.
long, also lined with amalgamated copper plates, after the pyritic and other heavy minerals have been separated by depositing in catch pits and other similar contrivances.
The former contrivances consist essentially of levers or cams with toothed surfaces or gripping shoes mounted upon transverse axes attached to the sides of the cage, whose function is to take hold of the guides and support the cage in the event of its becoming detached from the rope.
The use of these contrivances is more common in, collieries on the continent of Europe, where in some countries they are obligatory, than in England, where they are not generally popular owing to their uncertainty in action and the constant drag on the guides when the rope slacks.
In navigation he suggested many new contrivances, such as water-tight compartments, floating anchors to lay a ship to in a storm, and dishes that would not upset during a gale; and beginning in 1757 made repeated experiments with oil on stormy waters.
Though a few Unionists transferred their allegiance, notably Mr. Winston Churchill, and by-elections went badly, Mr Balfour still commanded a considerable though a dwindling majority, and the various contrivances of the opposition for combining all free-traders against the government were obstructed by the fact that anything tantamount to a vote of censure would not be supported by the "wobblers" in the ministerial party, while the government could always manage to draft some "safe" amendment acceptable to most of them.
Means of affording ventilation in all plant houses should be provided in at least two places - as near the floor as practicable, and at the top. Mechanical contrivances whereby whole sets of ventilators may be operated simultaneously are now in common use, and are much more convenient and economical than the older method of working each ventilator separately.
Various other contrivances take the place of garden pots for special purposes.
All these primitive contrivances are still in full use throughout India.
shown that contrivances of this order are wanting in sensibility, and often remain standing during movements that are distinctly perceptible.
Most of the mechanical contrivances which made Tycho Brahe's instruments so superior to those of his contemporaries were adopted at Cassel about 1584, and from that time the observations made there seem to have been about as accurate as Tycho's; but the resulting longitudes were 6' too great in consequence of the adopted solar parallax of 3'.
Within the town the arcades (or Lauben) on either side of the main street, and the numerous elaborately ornamented fountains attract the eye, as well as the two remaining towers that formerly stood on the old walls but are now in the centre of the town; the Zeitglockenthurm (famous for its singular 16th- century clock, with its mechanical contrivances, set in motion when the hour strikes) and the Kdfichthurm.
Historically theoretical mechanics began with the study of practical contrivances such as the lever, and the name mechanics Gr.
If E be the point in which the line of the string meets AB, we have pjCP, pz=EP. Many contrivances for actually drawing the resulting curves have been devised.
Sliding Contact (circular): Grooved Wheels.As the adhesion or friction between a pair of smooth wheels is seldom sufficient to prevent their slipping on each other, contrivances are ~ised tc increase their mutual hold.
Amongst contrivances for effecting this object are friction-cones.
There are many other contrivances of the same class, but the two just mentioned may serve for examples.
C a A revolving pendulum is an essential part of most of the contrivances called governors, for regulating the speed of prime movers, for further particulars of which see STEAM
It is too motive, too full of ingenious contrivances, to be really Greek.
He then, by means of rings of iron-wire, disks and other contrivances, altered the form of certain parts of the,surface of the oil.
His Art of Travel; or, Shifts and Contrivances in Wild Countries was first published in 1855.
Thus, though difficult or superfluous arts may easily be lost, it is hard to imagine the abandonment of contrivances of practical daily utility, where little skill is required and materials are easily accessible.
Steelyards are simple, trustworthy and durable, but unless special contrivances are introduced for ascertaining the position of the travelling poise with very great accuracy, there will be a little uncertainty as to the reading, and therefore steelyards are not in general so accurate as scale-beams. When carefully nicked they are well-adapted for weighing out definite quantities of goods, such as i lb, 2 lb, &c., as in such cases there is no question of estimation.
He displayed very early a taste and an aptitude for mechanical contrivances.
Behind these legal contrivances stood the fact that the army was organized in the same way as the nation was organized, being officered by gentlemen who had no desire to overthrow a constitution through which the class from which they sprung controlled the government.
This method, on which he laid great stress, and for the facilitation of which he invented a binocular glass, and devised some skilful mechanical contrivances, was offered by him in 1616 to the Spanish government, and afterwards to that of Tuscany, but in each case unsuccessfully; and the close of his life was occupied with prolonged but fruitless negotiations on the same subject with the states-general of Holland.
The common notions of the devil as black, ill-favoured, malicious, destructive and the like, have occasioned the application of the term to certain animals (the Tasmanian devil, the devil-fish, the coot), to mechanical contrivances (for tearing up cloth or separating wool), to pungent, highly seasoned dishes, broiled or fried.
The blast furnace in its simplest form is among the oldest, if not the oldest, of metallurgical contrivances.
artful contrivances and discard our (scheming for) gain, there would be no thieves nor robbers.
In general, I only use these little contrivances when I am forced to.
contrivances intended to represent the mechanism from which the human voice was derived.
Also, one suspects Jailbreak will require contrivances to exact a winner from the group.
Odysseus was on his way to being a true contriver; we seem content to be mere contrivances.
various contrivances by which Orchids are Fertilized by Insects.
With a box of tools and a few mighty simple contrivances he had made out to have a devil of a temple.
There are evils which have sported with the weakness and subdued the strength of all human contrivances to vanish them.
The relationship between Gigli and Ricki is given the room to develop gradually, without plot contrivances forcing them together.
manifest a strong tendency to personify all the contrivances of our own devising.
He himself set no value on the ingenious mechanical contrivances which made him famous, regarding them as beneath the dignity of pure science and even declining to leave any written record of them except in the case of the Sphairopeoia (Sphere-making), as to which see below.
The needle weir, so called from the long, slender spars being termed aiguilles in France, had the merit of simplicity in its earliest form; and by means of some ingenious contrivances, comprising a hook, winch, lever and rotating bar, for assisting the weir-keepers in placing and releasing the needles, the system has been applied successfully to the weirs of greater height required on the Meuse, the Main and the Moldau (fig.
In mammals both caecum and colon are often sacculated, a disposition caused by the arrangement of the longitudinal bands of muscular tissue in their walls; but the small intestine is always smooth and simple-walled externally, though its lining membrane often exhibits contrivances for increasing the absorbing surface without adding to the general bulk of the organ, such as the numerous small tags, or " villi," by which it is everywhere beset, and the more obvious transverse, longitudinal, or reticulating folds projecting into the interior, met with in many animals, of which the " valvulae conniventes " of man form well-known examples.
Sometimes the micropyle lies close to the base of the style, and then the pollentube enters it at once, but frequently it has to pass some distance into the ovary, being guided in its direction by various contrivances, as hairs, grooves, &c. In gymnosperms the pollen-grain resting on the apex of the nucellus sends out its pollen-tubes, which at once penetrate the nucellus (fig.
The history, indeed, of many a word lies hid in its equivocal uses; and it in no way derogates from the dignity of the highest poetry to gain strength and variety from the ingenious application of the same sounds to different senses, any more than from the contrivances of rhythm or the accompaniment of imitative sounds.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.