SPECULUM  , the Latin word for a See also:

• MIRROR (through O. Fr. mirour, mod. miroir, from a sup-posed Late Lat. miratorium, from mirari, to admire)

mirror, employed more particularly for a metallic mirror used in a reflecting See also:

• TELESCOPE

telescope . In See also:

• EARLY
• EARLY, JUBAL ANDERSON (1816-1894)

early See also:

• INSTRUMENTS

instruments metallic mirrors, made from an alloy of See also:

• COPPER (symbol Cu, atomic weight 63.1, H=1, or 63.6, O = 16)

copper and See also:

• TIN (Lat.- stannum, whence the chemical symbol " Sn "; atomic weight =117.6, 0=16)

tin, with the addition of a little See also:

• ARSENIC (symbol As, atomic weight 75.0)

arsenic or other metals to increase the whiteness, were customarily employed, but they have now been displaced by the more convenient silveron-See also:

• GLASS
• GLASS (O.E. glees, cf. Ger. Glas, perhaps derived from an old Teutonic root gla-, a variant of glo-, having the general sense of shining, cf. " glare," " glow ")
• GLASS, STAINED

glass mirror (see TELESCOPE) . Various forms of specula are used in See also:

• SURGERY
• SURGERY (Fr. chirurgie, from Gr. Xetpoupyfa, i.e. hand-work)

surgery for examining See also:

• INTERNAL

internal See also:

• ORGANS

organs .