ETHYLENE n.
y the action of concentrated sulphuric acid in alcohol. It is an unsaturated compound and combines directly with chlorine and bromine to form oily liquids (Dutch liquid), -- hence called olefiant gas. Called also ethene, elayl, and formerly, bicarbureted hydrogen. Ethylene series (Chem.), the series if unsaturated hydr…
EYEPIECE n.
The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Collimating eyepiece. See under Collimate. -- Negative, or Huyghenian, eyepiece, an eyepiece consisting of two plano-convex lenses with their curved sur…
FACTION n.
A party, in political society, combined or acting in union, in opposition to the government, or state; -- usually applied to a minority, but it may be applied to a majority; a combination or clique of partisans of any kind, acting for their own interests, especially if greedy, clamorous, and reckless of the common good…