The young gentleman and lady's philosophy : in a continued survey of the works of nature and art by way of dialogue . ; the external Tube being for the greateft Part open oheach Side : You obferve (2.) two thin biafs Plates moving regu-larly in that Appurture by the Motion of that internal Tube orScrew i and to keep them together you fee (3.) a fpiral Wire bearupon them from the End on the Infide of the outer Tube, theIntent of which is to prefs thofe Plates firmly together. (4.) Thefeveral Ivory Sliders which you here fee numbered i, 2, 3, 4,l^c. in which are contained the feveral fmall Objed
The young gentleman and lady's philosophy : in a continued survey of the works of nature and art by way of dialogue . ; the external Tube being for the greateft Part open oheach Side : You obferve (2.) two thin biafs Plates moving regu-larly in that Appurture by the Motion of that internal Tube orScrew i and to keep them together you fee (3.) a fpiral Wire bearupon them from the End on the Infide of the outer Tube, theIntent of which is to prefs thofe Plates firmly together. (4.) Thefeveral Ivory Sliders which you here fee numbered i, 2, 3, 4,l^c. in which are contained the feveral fmall Objedfs placed be-tween two thin Plates of ykfz^w^ Glafs, ufually called Talks;befides thefe there is (5.) this long Brafs open Frame, to whichis fitted an Ivory Slider, containing fmall Concave Glafles, witha plain Slip of Glafs placed over it for inclofing any Minuteliving Objeil without crufhlng it; this likewife, when ufed,is placed betvveen the two thin Plates, below which is (6.) athird Plate or Piece of Brafs with a cylindric Hollow to receive (7-) the £D6j/ferent F O RM S af Jlf^aU MICROSCOPES. Plate and L A D Y*s Philosophy. 169 (7.) the feveral Glafs Tubes, which you here fee, three in ±Setr, contained one within another, for holdinj? any Fluidswith Animalculae, Tadpole, Water-Newt, fmall Frog, ^ /Tiewing the Circulation of the Blood. (8.) At the End ofthe outer Tube is a Hole, with a Screw, to receive the feveralPlates of Brafs, or Buttons, which contain the fmall magnifyingGlalFes. (9.) At the external End of the inmoft Tube is aPiano Convex Lens, to throw Light upon the Objefl on theSliders. (10.) Over this Glafs are placed circular Pieces ofBrafs, with Holes or Apertures of a different Size, for propor-tioning the requifite Degree of Light. Thefe are the principalParts to be ufed in viewing tranfparent Objefts: But for thofethat are Opake, you are fupplied with the following Apparatus.{ir.) A fquarC) flat Piece of Brafs, with a Bevel Edge on oneSide, and
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Keywords: ., bookcentury1700, bookdecade1750, booksubjectscience, bookyear1759
