Experi 5th. A Model of a new Pump whofe Sucker has no Friction, an intermitting Fountain, Hiero's Fountain. All thofe Models of Pumps and Fountains are of Glafs, in all thofe Parts in which the Action paffes, and the Motion of the Valves and Suckers, are eafily perceived. Several Cisterns and other Vafes for making Experiments on Ice, ments on Ice and artificial Congelations. 2d. An Affortment of different Salts and Congelati- Fluids for congealing Water with a Vafe, in which without Ice, a Cold capable of freezing, may be produced. and artificial ons. Experiments for hewing the Nature and THIRD CLASS. Machines for making Experiments on the Air. III. A double barrelled Air-Pump mounted on a very folid Base. The Piftons are put in Motion by a Handle. Inftead of Valves Stop-Cocks are made Ufe of, which are opened and shut, and that by the fame Motion which raifes and lowers the Piftons; there is affixed to the Pump a whirling Machine, for the Experiments where it is necessary. A fingle barrelled Air-Pump, mounted on a folid Base. In the Conftruction of the whirling Machine, which ferves as an Apendage to this Pump, Care has been taken, that the Axis of the great Wheel Properties of may move along its Frame, in order to ftraiten the Chord, and that the borizontal Pulley, which receives the whirling Axis, may be raifed or lowered as the Height of the Receiver may require. the Air. Experi ments on Fire in Va cuo. Electrical ments in A large Receiver fitted for making Experiments on Bodies put in Motion in Vacuo. 2d. A Receiver of less Size fitted for the fame Ufes. 3d. A long and narrow Receiver fitted alfo for the fame Ufes. Thofe Vafes are fitted for the above Ufes, by the Means of a Brass Box, filled with a Sort of prepared Leather, through which passes a Steel AxleTree, which communicates the Motion within the Receiver without letting the Air enter. An Apparatus necessary for making the Experiments on Fire in Vacuo. An Apparatus for making electrical Experiments in Vacuo. A large Receiver fitted for operating in Vacuo; a tall narrow Receiver fitted for the fame Uses. Thofe Vafes are fitted for the above Ufes, by Means of a Brass Box prepared as above, through which paffes à Shaft of Metal, whofe Extremity is fitted for receiving different Sorts of Pincers, and other Inftru ments. Four Cruets mounted on one common Pedestal, and fufpended fo as to have their Contents poured out in Vacuo, which ferve for mixing different Fluids therein. 2d. Two Cruets fufpended in the fame Manner. This Machine is fo contrived, that the Cruets may be raifed or lowered, and brought nearer to each other, as may be required. An Apparatus for effaying Inflammations in Vacuo. A Receiver compofed of feveral Pieces, very tall, at the upper End Experiof which, a Machine is adapted with which may be repeated fix Times, hewing the the Experiment of the defcent of Bodies in Vacuo, when the Air is but once exhaufted. A large Vafe of Glafs adjusted to a Receiver, and difpofed for depriving Fishes in Water of Air. A large Globe of Glafs, joined to a Receiver by a Neck, to which is adapted a Stop-Cock, for making Experiments on the Vapours in the Air. 2d. Two Vafes of Comparison having for a common Bafe fmall Receiver, for fimilar Ufes. a A Receiver, to which are adapted two Barometers, one of Mercury and the other of coloured Water. 2d. Two Re Two large Receivers with a hollow Button at Top. ments for Defcent of Bodies in Experi ments for fhewing that the Air is fil led with Va 3 pours. Six fmall truncated Barometers of different Lengths, mounted each Experion a small Base, to which a Scale is adapted. 2d. Six small gage Tubes, ments for for compreffed and rarified Air. afcertaining the Degree Thefe Gage Inftruments are more commodious for Ufe than any hitherto of Comprefmade, and it is well known of what Importance it is in making Experiments, fion and Rato be affured of the Degree of Rarefraction, or of the Condenfation of the Air. the Air. A Receiver for making Experiments on burnt, or infected Air. A Fountain Bottle, and a Vafe to place it in, with feveral spouting A fmall Receiver for applying the Hand to the Air-Pump. A Supporter, and a fmall Vafe of Glats to place Eggs under a Re- A fmall Receiver with a fharp edged Brim, to cut an Apple, or any like Body. A large Glafs Tube, at the Top of which is adjusted, a Wooden Vase for proving the Porofoty of Vegetables. A Tube of Crystal whofe Bottom is of Leather, covered with Mer- A Bladder fuipended in a Reciver. 2d. A Bladder in a cylindrical A Machine for compreffing Air. refraction of Experiments on burnt and in fected Air. Experiments for fhewing the Spring of the Air and Experiments for fhewing the Preffure of the Air. Experiments for illuftrating the Theory of Sounds. Experiments for fhewing the Operations of Chimiftry. This Machine is of fufficient Strength to remove all Apprehenfions of Danger, and is fufficiently large to place all fuch Bodies with which Experiments are made by the Means of an Air-Pump; it is conftructed in fuch a Manner, that what paffes within, may easily be perceived, and the Air is compreffed with great Eafe by Means of a Lever which puts the Pifton of the Pump in Action. A fniall forcing Pump with Valves for compreffing Air in certain Experiments. A Glafs Vafe prepared for compreffing Air on Liquors. A Fountain of Compreffion of Copper. A Tube which contains Water without Air. A Kind of round Bellows, furnished with a long Tube for fhewing the powerful Efforts of Fluids. Two Hemifpheres of Copper for the Machine of Compreffion. This Air-Gun is furnished with a condenfing Syringe in the Butt, and is charged with Balls by a Receiver which contains 10. They may easily be taken out without letting the Air efcape. At each Shot only one goes off and one Charge of Air is fufficient for them all, and the last pierces an Oak Plank half an Inch thick. A Model of a Bellows, in which the Air is excited by the circular Motion of feveral Vans. 2d. A Model of a Bellows whofe Effect depends on a Fall of Water. A Glafs Bell fufpended, with a small Hammer put in Motion by a Screw, adapted for Experiments on Sound. A fmall Bell mounted on Clock-Work, with a Tricker, for Experiments on Sound in Vacuo. An accoustique Tube of a parabolic Figure. 2d. A Speaking-Trumpet. A graduated Monochord. 2d. Glaffes of feveral Tones. A large Column which imitates the Noife of Rain and Hail. Glafs Tears, with fome Inftruments neceffary for the Experiments to which they are applied. Capillary Tubes of different Sizes and Lengths. FOURTH CLASS. Machines for making Experiments on Fire. IV. A Lamp Furnace for fhewing the ordinary Operations of Chimistry. the Sand Bath, with the Cucurbit and with the Retort. An Affortment of Veffels of Glafs for the Lamp Furnace. A Table of an Enameller with a Bellows and Lamp; Pieces of Enamels and Tools, requifite for this Art. Inclined Planes which turn round by the Action of two lighted Candels. Second, a Lantern which turns round. ments on Several Fluids which ferment with Heat and Ebullition. Second, fe- Experiveral Fluids which ferment without Heat. Third, feveral Fluids which Fermentafermenting, burst into Flame, and the Vafes neceffary for thofe Ex- tion. periments. Fulminatory Subftances and Inftruments, necessary for performing Experiments on them. Burning Powders. 2d. Powders for accelerating the Fufion of tals. Third, feveral Difolvents of Metals. Experi ments on The Urinous Phofphorus. 2d. Urinous Phofphorus difolved in ferent Kinds of Oils. 3d. Luminous Calcinations. A Glafs Veffel, by which may be exhibited a Shower of Fire, produced by the Fall of Mercury in Vacuo. Papin's Digefter. A large Copper Æolipile with a long Neck, to which is adapted an accurate Stop-Cock, which ferves for condenfing Air in Vafes, when there is Reason to apprehend that the Moisture of other Air introduced Experimay hurt the Experiment.. 2d. A fmaller olipile for ordinary Ufes. ments for explaining 3d. An Æolipile for forming a Fountain of Fire, with the Spirit of the Effects Wine. 4th. An Æolipile mounted on a Carriage which recoils during of Fire arms the Experiment. A small recoiling Cannon for explaining the Nature of Rockets. Machines for making Experiments on Light and Colours. V.. A large Cafe, the Sides of which are of Glafs adapted for the Experiments on Refraction. is In the two leffer Sides of this Cafe are adjusted, concave and convex Surfaces. It can be raifed, lowered, or turned round on its Pedeftal, and furnifbed with a Lamp which in cafe of Neceffity, fupplies the Place of the Rays of the Sun. A triangular Box of Glafs, whofe Sides form with each other different Angles, mounted on a graduated Circle, with an Index for determining. the Angles of Refraction. Fire-works, &c. ments for illuftracing the Theory of Colours. Two Prifms of folid Crystal. 2d. A large folid Prifm mounted on a ExperiPedestal, fo that it can be raised, lowered, inclined, and turned round its Axis. 3d. A Prism similar to the former, mounted vertically on a Pedestal, fo that it can be raised, lowered, and turned round its Axis. 4th. A Right-angled triangular Prifm. 5th. A large triangular Prism of Rock Crystal mounted on a graduated Circle, with an Index. A large folding Table with its Appendages, adapted for making Experiments on Light. Six Frames covered with waxed Cloth, for rendering a Room per Experi ments for fhewing the different Refrangibility of the Rays of Light. Experiments for illuftrating the Laws of Vision. fectly dark, with a Tablet and Circles of Metal for opening Paffages to the Rays of the Sun, of different Magnitudes and Figures. A plain Mirror of Metal mounted on a Stem which can be lengthened and fhorted, and on which the Mirror can be raised, lowered, inclined, and turned round, for introducing the Rays of the Sun into a darkened Room. 2d. A Mirror of Glafs mounted as the former, and for the fame Ufes. Four Glaffes of different Colours, mounted in Tortoife Shell. 2d. Four Mirrors of Glafs mounted in the fame Manner. A large Glafs Lens of fix Feet Focus Length, mounted on a Pedeftal whofe Stem can be lengthed or fhortened. 2d. A Glafs Lens of a fhorter Focus mounted, fo that it can be raised, lowered or inclined. A Frame, in which is adjusted a Glafs Lens between two vertical Planes, for fhewing that fome Rays of Light unite in a fhorter Focus than others. This Machine is fo contrived, that the Experiment may be made upon any Ray feparately, and may be adjufted to the Motion of the Sun. A large concave Glafs mounted. 2d. A large multilateral Glass mounted. 3d. Two Polyhedrons of very pure Glafs. 4th Two concave Mirrors of Glass. A very large convex Glafs, compofed of two curved Glaffes mounted on a Pedestal, for making Experiments on the Refraction of Light through different Fluids. A large vertical Plane for receiving the Image of the Sun when it has paffed through the Prifm. 2d. A fmaller Plane, to which is adapted, an excentric Circle for making the Rays of Light of different Colours, pafs fucceffively. A Cloth fix Feet fquare fpread on a Frame, which can be raised and lowered for receiving the Images produced by the Magic Lanthorn, and the Camera Obfcura. An artificial Eye with Spectacles for different Ages, for fhewing how the Defects of Sight are remedied by the Help of Glaffes A Cornea of an Infect adapted to a fmall Microscope for fhewing that the Eyes of those Animals, for the most Part, are Multipliers. An Affortment of Fluids for Experiments on the Colours which refult from their Mixture. which appears and disappears feveral 2d. Sympathetic Ink. Invisible Ink, the Writing of Times, when heated at the Fire. A large Mirror of Metal, concave on one Side, and convex on the ments for other, mounted on a Pedestal. Two convex Mirrors of Pafte-board filverilluftrating the Doctrine ed over, with their Appendages, for fome catoptrical Experiments. Experi of the Re Alection of 2d. A A cylindrical Mirror of Metal, with thirty Anamorphofes. conic Mirror of Metal, with fix Anamorphofes. A pyramidal Mirror of Metal, with four Anamorphofes. |