"If light from a highly luminous body is admitted to a darkened room through a small hole in the shutter…
The point of the finest cambric needle, with a particle of dust (above) and bacteria (below) for scale.
An illustration of a coronet. A coronet is a small crown consisting of ornaments fixed on a metal ring.…
A flower with elegant blue petals. The pedals are approximately 1.5 inches in length.
A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are…
A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are…
"Hence the image of the object, when reflected from the convex mirror, appears smaller than the object…
"Piece of small intestine cut open to show wrinkling of inner coat bearing villi." —Davison, 1910