...produced by a peculiar configuration of surface ; and by examining this surface with microscopes, he discovered in almost every specimen a grooved structure...texture of the skin at the top of an infant's finger," &c. By cutting grooves upon steel at the distance of from the 2,000th to the 10,000th of an inch apart,...

...strueture, like the delieate texture of the skin at the top of an infant-s finger, or like the seetion of the annual growths of wood as seen upon a dressed...the naked eye ; but they are often so minute that 3,000 of them are eontained in an ineh." It is remarkable that these irideseent hues ean be eommunieated...

...these chromatic effects, discovered, on examining the surface of mother-of-pearl with a microscope, " a grooved structure, like the delicate texture of the skin at the top of an infants finger, or like the section of the annual growths of wood, as seen upon a dressed plank of...

...of this substance with high magnifying powers, he perceived a grooved structure, closely resembling the delicate texture of the skin at the top of an infant's finger, or the minute corrugations often observable on surfaces which are covered with oil-paint or varnish. The...

...of this substance with higli magnifying powers, he perceived a grooved structure, cloak resembling the delicate texture of the skin at the top of an infant's finger, or the minute corrugations often observable on surfaces which are covered with oil-paint or varnish. The...

...delicately grooved surface of the pearl, which, Sir David Brewster says, resembles closely the fine texture of the skin at the top of an infant's finger, or the minute corrugations which are often seen on surfaces covered with varnish or oil-paint. In other...

...delicately grooved surface of the pearl, which, Sir David Brewster says, resembles closely the fine texture of the skin at the top of an infant's finger, or the minute corrugations which are often seen on surfaces covered with varnish or oil-paint. In other...

...delicately grooved surface of the pearl, jvhich, Sir David Brewster says, resembles closely the fine texture of the skin at the top of an infant's finger, or the minute corrugations which are often seen on surfaces covered with varnish or oil-paint. In other...

...that we find in all 'mother-of-pearl a grooved structure upon its surface, resembling very closely the delicate texture of the skin at the top of an infant's ringer, or the minute corrugations which are often seen on surfaces covered with varnish or with oil-paint.'...

...that we find in all ' mother-of-pearl a grooved structure upon its surface, resembling very closely the delicate texture of the skin at the top of an infant's finger, or the minute corrugations which are often seen on surfaces covered with varnish or with oil-paint.' Similar...