An illustrated encyclopædic medical dictionaryBeing a dictionary of the technical terms used by writers on medicine and the collateral sciences, in the Latin, English, French and German languages . ists in cutting off both sides of the ordinarymirror, so as to change the circle to a parallelogram. This isswung on two pivots, and admits of an inclination of 25°. It tiltsboth ways, and can be used for either the upright or invertedmethod of examination. In Lorings latest modification the es-sential points are that the glasses have a diameter of not less than6 mm. and that their number is suflfic
An illustrated encyclopædic medical dictionaryBeing a dictionary of the technical terms used by writers on medicine and the collateral sciences, in the Latin, English, French and German languages . ists in cutting off both sides of the ordinarymirror, so as to change the circle to a parallelogram. This isswung on two pivots, and admits of an inclination of 25°. It tiltsboth ways, and can be used for either the upright or invertedmethod of examination. In Lorings latest modification the es-sential points are that the glasses have a diameter of not less than6 mm. and that their number is suflficiently large, This is effectedby a single disc and the segment of a disc, the latter being thequadrant of a circle. The single disc contains 16-glasses on themetric system, and the quadrant contains four glasses. [, of the Med. Sci,, Apr., 1890, p. 340, Jan., 1874 ; Trans, ofthe Fifth Internat. Ophthal. Congr., 1876; Trans, of the Am^Ophth. Soc, 1878 (F).]—Metric o. A single-disc or double-disc which the concave and convex lenses are graduated by themetric scale, [a, 34.]—Monoyers o. An o. made up of a glassconcave mirror with a small unsilvered space at the centre set in a. LORINGS TWELVE-LENSO PHTHALMOSCOPE. A, ape: A, at; A^, ah; A*, all; Ch, chin; Ch, loch (Scottish); E, he; E*, ell; G, go; I, die; I^, in; N, in; N^, tank; 2469 OPHTHALMOSCOPYOPIANINE simple born frame, a born plate with two positive and one negativecorrecting-glasses set in an arc, and a convex lena. [Graefe andSaemiscb (F).]—Monoyer*s o. for three observers. A modi-fication of Sichels o. for two observers by the addition of a secondbox or frame. The principal observer looks through the hole inthe mirror between the two prisms, while each of the others ex-amines the eye through the eye-piece of one of the boxes. [F.]—Murray and Heaths binocular o. An o. in w^bich two prismsare placed behind the fixed perforated mirror so as to divide thelight-pencil and reflect it right and left. The r
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmedicine, bookyear189
