The engineer's and mechanic's encyclopædia, Volume 11849 |
Other editions - View all
Common terms and phrases
acid alkali ammonia angles antimony aperture apparatus applied axis barrel body boiler boiling bottom brass called carbonic acid carriage cast iron centre charcoal chlorine cistern coal cock colour condensed consists construction containing copper cylinder diameter distillation effect employed engine engraving equal feet fire fixed flue fluid force frame fuel furnace glass groove heat hole horizontal inches instrument invention iron length lever liquid liquor lower machine matter means melted mercury metal motion mould mould boxes mucilage muriatic acid nitric acid obtained operation passing patent piece pipe piston placed plate portion potash pressure prevent produced proportion pulley purpose quantity represents rollers round screw shaft side sliding specific gravity spermaceti steam substance sulphuric sulphuric acid surface tallow temperature thickness tube turned upper usually valve vapour velocity vertical vessel weight wheel wood zinc
Popular passages
Page 605 - Fig. T. \ The circumference of every circle, whether great or small, is supposed to be divided into 360 equal parts, called degrees; and every degree into 60 parts, called minutes; and every minute into 60 seconds. To measure the inclination of lines to each other, or angles, a circle is described round the angulai point, as a centre, as
Page 605 - I. The radius of a circle is a straight line drawn from the centre to the circumference, as c d, Fig. O. The radius is the opening of the compass when a
Page 135 - A fluctuating and unsettled state in the mercurial column indicates changeable weather. The other important purpose to which the barometer is applied, is the measurement of altitudes. If the atmosphere were a liquid of nearly equal density, like water, the measurement of heights by the barometer would be the simplest process imaginable: for we
Page 605 - Fig. P. Every diameter divides the circle into two equal parts. A tangent is a straight line, drawn so as just to touch a circle without cutting it, as de, Fig. T. The point where it touches the circle, is called the point of contact; and a tangent cannot touch a circle in more points than one. A
Page 13 - their productiveness, ought to be much greater in warm and dry countries than in cold and moist ones ; and the quantity of fine aluminous earth they contain should be larger. Soils, likewise, that are situated on declivities, ought to be more absorbent than those in the same climate on plains
Page 606 - 2. When the point is at, or near the end of the line, take any point d, fig. 3, on the side of the line on which the perpendicular is to be drawn, and with the radius or distance dc, describe the arc e cf, cutting eB in e and
Page 450 - shape, is in a state to receive the drawing of the pattern; this being put in, a blunt steel tool, or burnisher, or die, is to be applied successively to all those parts of the pattern intended to be in relief, and at the same time is to be driven very cautiously without breaking the
Page 437 - DRIFT, in Navigation, the angle which the line of a ship's motion makes with the nearest meridian, when she drives with her side to the winds and waves, and is not governed by the power of the helm. It also implies the distance which the ship drives on that line.
Page 441 - the feet. In like manner multiply all the multiplicand by the inches and parts of the multiplier, and set the result of each in one place, removed to the right hand of those in the multiplicand, and the sum of these successive products will be the answer. Example. Multiply 6 feet 4 inches 3 parts by 10 feet 3 inches 9 parts. ft. in.
Page 438 - A martial musical instrument in the form of a cylinder, hollow within, and covered at the two ends with vellum, which is stretched or slackened at pleasure, by means of cords with sliding knots. The cylinders are usually made of wood, but sometimes of brass. Kettle-drums are large basons or hemispheres of copper or brass,