Walking with a book on your head was thought to encourage you to stand up straight with a straight back, long neck and with your eyes facing forward. Learning to walk with a book on your head teaches you to lengthen upward instead of slouching around. Originally, the term orthopedics meant the correcting of musculoskeletal deformities in children. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/walking-with-a-book-on-your-head-was-thought-to-encourage-you-to-stand-up-straight-with-a-straight-back-long-neck-and-with-your-eyes-facing-forward-learning-to-walk-with-a-book-on-your-head-teaches-you-to-lengthen-upward-instead-of-slouching-around-originally-the-term-orthopedics-meant-the-correcting-of-musculoskeletal-deformities-in-children-image246614173.html
RMT966W1–Walking with a book on your head was thought to encourage you to stand up straight with a straight back, long neck and with your eyes facing forward. Learning to walk with a book on your head teaches you to lengthen upward instead of slouching around. Originally, the term orthopedics meant the correcting of musculoskeletal deformities in children.
Warplanes flying in a straight line. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/warplanes-flying-in-a-straight-line-image458814074.html
RM2HJCP0X–Warplanes flying in a straight line.
Church choir children, Tusla, Oklahoma. One girl helps another get her robe on straight. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/church-choir-children-tusla-oklahoma-one-girl-helps-another-get-her-robe-on-straight-image482628193.html
RM2K15H55–Church choir children, Tusla, Oklahoma. One girl helps another get her robe on straight.
Descartes' mechanical view of a universe filled with plenum and a system of vortexes that carries planets around the sun. Descartes proposed in 1644 that no empty space can exist and that space must consequently be filled with matter. The parts of this matter tend to move in straight paths, but because they lie close together, they can not move freely, which according to Descartes implies that every motion is circular, so the ether is filled with vortices. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/descartes-mechanical-view-of-a-universe-filled-with-plenum-and-a-system-of-vortexes-that-carries-planets-around-the-sun-descartes-proposed-in-1644-that-no-empty-space-can-exist-and-that-space-must-consequently-be-filled-with-matter-the-parts-of-this-matter-tend-to-move-in-straight-paths-but-because-they-lie-close-together-they-can-not-move-freely-which-according-to-descartes-implies-that-every-motion-is-circular-so-the-ether-is-filled-with-vortices-image246622621.html
RMT96HJN–Descartes' mechanical view of a universe filled with plenum and a system of vortexes that carries planets around the sun. Descartes proposed in 1644 that no empty space can exist and that space must consequently be filled with matter. The parts of this matter tend to move in straight paths, but because they lie close together, they can not move freely, which according to Descartes implies that every motion is circular, so the ether is filled with vortices.
Rene Just Hauy (February 28, 1743 - June 3, 1822) was a French mineralogist and ordained Roman Catholic Priest. His interest in crystallography resulted from the accidental breaking of a piece of calcite. Upon examination he discovered that they cleaved along straight planes that met at constant angles. He broke more pieces of calcite and found that, regardless of the original shape, the broken fragments were consistently rhombohedral which led to his theory of crystal structure. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/rene-just-hauy-february-28-1743-june-3-1822-was-a-french-mineralogist-and-ordained-roman-catholic-priest-his-interest-in-crystallography-resulted-from-the-accidental-breaking-of-a-piece-of-calcite-upon-examination-he-discovered-that-they-cleaved-along-straight-planes-that-met-at-constant-angles-he-broke-more-pieces-of-calcite-and-found-that-regardless-of-the-original-shape-the-broken-fragments-were-consistently-rhombohedral-which-led-to-his-theory-of-crystal-structure-image246588131.html
RMT951JY–Rene Just Hauy (February 28, 1743 - June 3, 1822) was a French mineralogist and ordained Roman Catholic Priest. His interest in crystallography resulted from the accidental breaking of a piece of calcite. Upon examination he discovered that they cleaved along straight planes that met at constant angles. He broke more pieces of calcite and found that, regardless of the original shape, the broken fragments were consistently rhombohedral which led to his theory of crystal structure.
Rene Just Hauy (February 28, 1743 - June 3, 1822) was a French mineralogist and ordained Roman Catholic Priest. His interest in crystallography resulted from the accidental breaking of a piece of calcite. Upon examination he discovered that they cleaved along straight planes that met at constant angles. He broke more pieces of calcite and found that, regardless of the original shape, the broken fragments were consistently rhombohedral which led to his theory of crystal structure. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/rene-just-hauy-february-28-1743-june-3-1822-was-a-french-mineralogist-and-ordained-roman-catholic-priest-his-interest-in-crystallography-resulted-from-the-accidental-breaking-of-a-piece-of-calcite-upon-examination-he-discovered-that-they-cleaved-along-straight-planes-that-met-at-constant-angles-he-broke-more-pieces-of-calcite-and-found-that-regardless-of-the-original-shape-the-broken-fragments-were-consistently-rhombohedral-which-led-to-his-theory-of-crystal-structure-image246588133.html
RMT951K1–Rene Just Hauy (February 28, 1743 - June 3, 1822) was a French mineralogist and ordained Roman Catholic Priest. His interest in crystallography resulted from the accidental breaking of a piece of calcite. Upon examination he discovered that they cleaved along straight planes that met at constant angles. He broke more pieces of calcite and found that, regardless of the original shape, the broken fragments were consistently rhombohedral which led to his theory of crystal structure.
René Just Hauy (February 28, 1743 - June 3, 1822) was a French mineralogist and ordained Roman Catholic Priest. His interest in crystallography resulted from the accidental breaking of a piece of calcite. Upon examination he discovered that they cleaved along straight planes that met at constant angles. He broke more pieces of calcite and found that, regardless of the original shape, the broken fragments were consistently rhombohedral which led to his theory of crystal structure. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/ren-just-hauy-february-28-1743-june-3-1822-was-a-french-mineralogist-and-ordained-roman-catholic-priest-his-interest-in-crystallography-resulted-from-the-accidental-breaking-of-a-piece-of-calcite-upon-examination-he-discovered-that-they-cleaved-along-straight-planes-that-met-at-constant-angles-he-broke-more-pieces-of-calcite-and-found-that-regardless-of-the-original-shape-the-broken-fragments-were-consistently-rhombohedral-which-led-to-his-theory-of-crystal-structure-image246611984.html
RMT9642T–René Just Hauy (February 28, 1743 - June 3, 1822) was a French mineralogist and ordained Roman Catholic Priest. His interest in crystallography resulted from the accidental breaking of a piece of calcite. Upon examination he discovered that they cleaved along straight planes that met at constant angles. He broke more pieces of calcite and found that, regardless of the original shape, the broken fragments were consistently rhombohedral which led to his theory of crystal structure.
South American Indians Ritual Ceremony, 1490s Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/south-american-indians-ritual-ceremony-1490s-image352804157.html
RM2BDYH8D–South American Indians Ritual Ceremony, 1490s
South American Indians Ritual Ceremony, 1490s Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/south-american-indians-ritual-ceremony-1490s-image416767844.html
RM2F61BHT–South American Indians Ritual Ceremony, 1490s
South American Indians Ritual Ceremony, 1490s Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/south-american-indians-ritual-ceremony-1490s-image386290896.html
RF2DCD1YC–South American Indians Ritual Ceremony, 1490s
A girl tries, unsuccsessfully, to do a headstand like her boy friend. Circa 1950's, 1960's. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-girl-tries-unsuccsessfully-to-do-a-headstand-like-her-boy-friend-circa-1950s-1960s-image482628280.html
RM2K15H88–A girl tries, unsuccsessfully, to do a headstand like her boy friend. Circa 1950's, 1960's.
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