GOLD n.
chas of Southern Europe. There are many South African species of the same genus. -- Gold foil, thin sheets of gold, as used by dentists and others. See Gold leaf. -- Gold knobs or knoppes (Bot.), buttercups. -- Gold lace, a kind of lace, made of gold thread. -- Gold latten, a thin plate of gold or gilded metal. --…
LEYDEN JAR; LEYDEN PHIAL n.
A glass jar or bottle used to accumulate electricity. It is coated with tin foil, within and without, nearly to its top, and is surmounted by a brass knob which communicates with the inner coating, for the purpose of charging it with electricity. It is so named from having been invented in Leyden, Holland.…
MOON n.
a full moon. -- Moon madness, lunacy. [Poetic] -- Moon month, a lunar month. -- Moon trefoil (Bot.), a shrubby species of medic (Medicago arborea). See Medic. -- Moon year, a lunar year, consisting of lunar months, being sometimes twelve and sometimes thirteen.
PHONOGRAPH n.
consists of a rotating cylinder or disk covered with some material easily indented, as tinfoil, wax, paraffin, etc., above which is a thin plate carrying a stylus. As the plate vibrates under the influence of a sound, the stylus makes minute indentations or undulations in the soft material, and these, when the cylinder…
PLATINUM n.
is used for crucibles, for stills for sulphuric acid, rarely for coin, and in the form of foil and wire for many purposes. Specific gravity 21.5. Atomic weight 194.3. Symbol Pt. Formerly called platina. Platinum black (Chem.), a soft, dull black powder, consisting of finely divided metallic platinum obtained by reducti…