Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I

by Arnold James Cooley; Richard Vine Tuson

ACETOLES. [Fr.] In French pharmacy, medicated vinegars obtained by maceration.

ACETOUS FERMENTATION. See Acetification.

ACETUM. [L.] Vinegar.

ACETYL. Syn. Acetyle. A name originally given to a hypothetical body, having the formula C₂H₃, and regarded by Berzelius as the radical of

the acetates and their congeners. The acetyl of Gerhardt (C₂H₃O) is, however, according to that chemist, the true radical of the acetates. Williamson, in order to remove the confusion of terms occasioned by the application of the same name to compounds of different composition, proposed the title of othyl for the radical C₂H₃O.

ACHAR. See Pickles.

ACEIILE′INE (-kĭl-). A peculiar bitter principle obtained from achillé a millefolium (Linn.), or yarrow.

A′CHOR, (-kŏr). [Gr.] See Scald-head.

ACHROMAT′IC (ăk-ro-). Syn. Achromatique, Fr. In optics, devoid of colour; bodies that transmit light without decomposition, and consequently, without the formation of coloured rings or fringes; applied to compound lenses, prisms, &c., and to instruments fitted with them.

ACRO′MATISM. Syn. Achromatisme, Fr. In optics, the state of being achromatic; the absence of coloured fringes in the images of objects seen through a lens or prism.