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Mn. GLlGGoN, in one of his late lectures al Boston, gave the annexed information re- spectng the composition of the colors used by Ancient Egyptians, in their earliest and latest pictorial scenes--colors which, after a lapse of four thousand years, stand unri- vailed ill brilliancy and beauty:

 stTo begin with WHITE. This is so per- feet that after the lapse of 4000 years it's lustre is inimitable. It was formed of pure chalk, by pounding the various species of fossil crab, Sc. that abound in Egyptian limestone quarries.

 "YELLow, was yellow iron oclre--found of ali possible shades in the strata of Egypt and N Nubia. Oxides of iron in their natural state; sometimes also burned, 10 vary the color.

 "REp, was red earthy 5ole in it's natural state--trtoxides of iron, in which is, classed the colcotar, or violet of vitrol.''

 @BLUE, comprising the costly Ultra ma rine,' Is sometimes an oxide of copper, ire quently an oxide of iron, and many Egyp- tan blues give oxide of cobalt, under analys. These artificial formations imply extreme chemical skill.

 s.GREEN was compounded of artificial metdiftc blues, and natural yelioW ocilTes--. and, as the blue itself was formed by vitii- lying oxides of iron, copper or cobalt with sand and soda, in crueibles or in balls, sub jected to the heat of the furnace; and as blues and greens abound in the paintings, evan of the pyramidial era, Cor long before Abraham), this not only explains why the Egyptians well acquainted with glass in those days;- but that they knew how to color it, as is proved by relics of all kinds of colored glass itself, abounding in Museums, and by glass vases drawn on the monuments of exquisite colors, produced by arts now lost

 "BLAcK is sometimes pure bone black sometimes il is black earth, (oxide of from, found in Nilotic mines.

 ssThese colors, in every shade. reduced to an inpalpable powder by grinding, mixed with Gum Arabic, and diluted with water, were those used by the Egyptians, and were applied on the subject to be painted, after the wall had been coated with a layer of staleeo, prepared from Gypsum, and the colors were laid on in ordinary fresco. The mummy cases have established, that the ancient Egyptians also understood encaustic painting with wax dissolved in naptha.