The body of the microscope, A B.
The slider-holder, K.
The tube, with the condensing lens L, to be used by candle-light.
The pin and arm a, either for the above lens, or for the silver concave speculum e.
The silver concave speculum e, fitted to the arm above, and used common to all the magnifiers in the wheel and body A B, it is to reflect the light from the concave or plane mirror O below, upon the opake objects, then called the compound opake microscope.
A silver concave speculum f, with a single magnifier; it screws to the under part of the arm C D in room of the wheel of magnifiers, and forms then the single opake microscope.
A brass cone g, to place under the stage N I S, and serves to diminish the reflected light when necessary.
The jointed nippers b, fitted to the stage, to hold any small insect, or other opake object.
A cylinder of ivory h, to fix on the pointed end of the nippers, black on one side and white on the other, to make a contrast to the opake object used.
Six ivory sliders, i, each having four holes, and objects contained between two talcs confined together by brass circular wires. One of the sliders is usually sent without objects, to be supplied at pleasure. When used, they are placed between the perforated plates of the slider-holder K; where also is to be applied the brass frame slider k, containing in one brass piece four small concave glasses fixed; a narrow slip of glass slides over these, all within the frame; so that any very small living object, as a mite, &c., may be viewed with the proper security.