Photo Researchers ftp March 2011

Agriculture in the 1400s.

Agriculture in the 1400s.

Red Mulberry or Silkworm tree, from Mattioli's Commentaires, Lyons, 1579. The Mulberry was highly esteemed in ancient times. The Romans ate Mulberries...

Red Mulberry or Silkworm tree, from Mattioli's Commentaires, Lyons, 1579. The Mulberry was highly esteemed in ancient times. The Romans ate Mulberries...

The main use for the Larkspur herb in the middle ages was to get rid of head lice. The Roman aristocrat Crescentius said: "The seed made into a powder...

The main use for the Larkspur herb in the middle ages was to get rid of head lice. The Roman aristocrat Crescentius said: "The seed made into a powder...

The main use for the Larkspur herb in the middle ages was to get rid of head lice. The Roman aristocrat Crescentius said: "The seed made into a powder...

The 11th century first Hospital of Saint John. Three vaults built into a later wall near the Church of the Holy Sepulchre are the only visible remains...

The 11th century first Hospital of Saint John. Three vaults built into a later wall near the Church of the Holy Sepulchre are the only visible remains...

The 11th century first Hospital of Saint John. Three vaults built into a later wall near the Church of the Holy Sepulchre are the only visible remains...

A portrait of Saladin, the great Sultan who united the Muslims and recaptured Jerusalem.

A portrait of Saladin, the great Sultan who united the Muslims and recaptured Jerusalem.

A portrait of Saladin, the great Sultan who united the Muslims and recaptured Jerusalem.

Charles Darwin (1809-1882), British naturalist. Darwin studied medicine and theology, but was most interested in natural history. In 1831 he joined th...

Charles Robert Darwin. Darwin (1809 - 1882), British naturalist, argued the theory of natural selection in his book "Origin of Species" (1859). While...

Erasmus Darwin, Charles Darwin's grandfather, was a respected physician, a well known poet, philosopher, botanist, and naturalist. He was one of the m...

Charles Darwin (1809-1882), English naturalist and author of the Origin of Species. He suggested that natural variation in a species creates a wide ra...

Emily Warren Roebling (1843-1903), the wife of Col. Washington Roebling. She took over from her husband, who was Chief Engineer of the Brooklyn Bridg...

Workmen in a Virginia City retort house. They are removing quicksiler, which will be used again, from the silver amalgam created earlier in the refini...

An illustration from Frank Leslie's Illustrated Newspaper, April 20, 1878, depicting workmen in the assay office molding melted bullion into bars. At...

Illustration of Garden Rue. This herb is poisonous if consumed in large quantities. It can cause photosensitivity and induce abortion.

(Cassia cassia) native to southern China is an evergreen tree with long cylindrical pods and an aromatic bark with a fragrant, cinnamon like flavor ca...

"As the soul of a dying man is breathed out of his body, angels and demons fight for control of it; for many peoples the soul is not merely a function...

A Harper's weekly picture shows Whitney's cotton gin in operation. The idea of interchangeable parts, made by such power driven tools as this drill pr...

A Harper's weekly picture shows Whitney's cotton gin in operation. The idea of interchangeable parts, made by such power driven tools as this drill pr...

A skeleton on a slab, with a dissection prop. Allegorical death.

A skeleton on a slab, with a dissection prop. Allegorical death.

Skeletons interrupting a gathering. Allegorical death.

Skeletons interrupting a gathering. Allegorical death.

Skeletons interrupting a gathering. Allegorical death.

Illustration of Garden Rue. This herb is poisonous if consumed in large quantities. It can cause photosensitivity and induce abortion.

Illustration of Garden Rue. This herb is poisonous if consumed in large quantities. It can cause photosensitivity and induce abortion.

Illustration of Garden Rue. This herb is poisonous if consumed in large quantities. It can cause photosensitivity and induce abortion.

(Cassia cassia) native to southern China is an evergreen tree with long cylindrical pods and an aromatic bark with a fragrant, cinnamon like flavor ca...

(Cassia cassia) native to southern China is an evergreen tree with long cylindrical pods and an aromatic bark with a fragrant, cinnamon like flavor ca...

"As the soul of a dying man is breathed out of his body, angels and demons fight for control of it; for many peoples the soul is not merely a function...

"As the soul of a dying man is breathed out of his body, angels and demons fight for control of it; for many peoples the soul is not merely a function...

The brick maker bakes smooth bricks and roof tiles from clay; the art was invented by Cynira.

A butcher does a brisk business.

The clockmaker manufactures hourglasses, and builds and paints wooden cases for his carefully made timepieces.

A cheese maker prepares his stock.

The coin stamper makes coins of all denominations of proper metal content and weight, artistically stamped.

At the Tunguska event in Siberia in 1908, trees were blown down and animals killed. Possibly a fragment from a cometary nucleus caused the explosion.

The tanner soaks the hides in a stream, throws them into the lime, leaves them a long time in the tan, then dries them on poles.

Encounter between the Earth and a Comet of June 13, 1857, from "Actualites Astrologiques."

The miller pours the grain brought to him between the millstones and grinds it, and does not withhold the bran; he also pounds stockfish and crushes h...

Matthias Gerung, Apocalypse Illustration, 1547, woodcut. This print depicts the Star Wormwood from Revelation 8:10-11: "And the third angel sounded an...

The brick maker bakes smooth bricks and roof tiles from clay; the art was invented by Cynira.

The brick maker bakes smooth bricks and roof tiles from clay; the art was invented by Cynira.

A butcher does a brisk business.