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r a reversed negative. After the dichromate has been washed out, the film is soaked in glycerin and water. As this treatment causes swelling in those parts of the film which have been acted on by light, a plate results from which impressions can be taken with prepared ink. The albertype, phototype, and heliotype are co…

A pricking; stimulation. [Obs.] That acid piecering spirit which, with such activity and compunction, invadeth the brains and nostrils. Sir T. Browne.

A smokeless powder composed of nitroglycerin, guncotton, and mineral jelly, and used by the British army and in other services. In making it the ingredients are mixed into a paste with the addition of acetone and pressed out into cords (of various diameters) resembling brown twine, which are dried and cut to length. A…

or silk on one side with some adhesive substance, commonly a mixture of isinglass and glycerin.

nce its name), but now made of an oxide of lead and oil, and consisting essentially of glycerin mixed with lead salts of the fat acids.

An aqueous solution of carbolic acid, borax, sodium bicarbonate, and glycerin, used as a spray in diseases of the nose and throat.

; esp., in high explosives, the sawdust, infusorial earth, mica, etc., mixed with nitroglycerin to make a damp powder (dynamite, etc.) less dangerous to transport, and ordinarily explosive only by suitable fulminating caps.

xplosive substance consisting essentially of sawdust or wood pulp, saturated with nitroglycerin and other similar nitro compounds. It is inferior to dynamite, and is more liable to explosion.

An explosive substance consisting of nitroglycerin absorbed by some inert, porous solid, as infusorial earth, sawdust, etc. It is safer than nitroglycerin, being less liable to explosion from moderate shocks, or from spontaneous decomposition.

the alga Protococcus vulgaris. It is a tetrabasic alcohol, corresponding to glycol and glycerin.

residue of any oxygen acid, organic or inorganic; thus the natural fats are esters of glycerin and the fatty acids, oleic, etc.

Any one of the several complex ethers of ethyl and glycerin.

a compound or mixture susceptible of a rapid chemical reaction, as gunpowder, or nitro-glycerine.

of the second class, on the other hand, are chemical substances, as a rule soluble in glycerin and precipitated by alcohol. In action they are catalytic and, mainly, hydrolytic. Good examples are pepsin of the dastric juice, ptyalin of the salvia, and disease of malt. globular proteins, capable of catalyzing a wide va…

Hurling denunciations, menaces, or censures. Fulminating oil, nitroglycerin. -- Fulminating powder (Chem.) any violently explosive powder, but especially one of the fulminates, as mercuric fulminate.

s found in Norway in connection with glaciers. See Pothole. -- Giant powder. See Nitroglycerin. -- Giant puffball (Bot.), a fungus (Lycoperdon giganteum), edible when young, and when dried used for stanching wounds. -- Giant salamander (Zoöl.), a very large aquatic salamander (Megalobatrachus maximus), found in Japa…

Same as Nitroglycerin; -- called also oil of glonoin. [Obs.]

Pertaining to, or derived from, glycerin. Glyceric acid (Chem.), an organic acid, obtained by the partial oxidation of glycerin, as a thick liquid. It is a hydroxyl derivative of propionic acid, and has both acid and alcoholic properties.

A compound ether (formed from glycerin). Some glycerides exist ready formed as natural fats, others are produced artificially.

A medicinal preparation made by mixing or dissolving a substance in glycerin.