Sylvia Rose
Heliozoa: Microscopic Sun Animalcules
Heliozoa, or sun animalcules, are remarkable protozoa with bodies of spheres, bristling with stiff, radiating arms or axopodia. Found in...
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Sylvia Rose
Nov 167 min read
Nine Years War 1688-1697 France vs. Europe
The Nine Years War, also known as the War of the League of Augsburg, is a key conflict in European history. Fierce battles erupt,...
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Sylvia Rose
Nov 155 min read
Liver of Sulfur: Alchemy, Metal & Medicine
Liver of Sulfur is a unique compound of alchemy, metallurgy and medicine. Also known as hepar sulfuris or sulfurated potash, Liver of...
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Sylvia Rose
Nov 124 min read
Diana's Tree: Silver Crystals of Lunar Caustic
Diana's Tree ( Arbor Diana or Dianae ) is one of the most intriguing creations of alchemy. Its delicate branches of crystallized silver...
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Sylvia Rose
Nov 93 min read
Iodine (I): Origin, Properties, Uses & Facts
Iodine (I) is an essential element in biology, industry, science and health. It's known for its intense violet gas and strong odor....
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Sylvia Rose
Nov 95 min read
Cornstarch: Cuisine, Beauty, Cleaning Uses
Cornstarch, also called corn flour, is a common ingredient worldwide. A fine, white powder derived from the endosperm of corn kernels,...
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Sylvia Rose
Nov 95 min read
Scheele's Green: History's Most Toxic Pigment
Scheele's Green is a rich, vibrant green. Its color appeal surpasses that of the copper carbonate paints of the late 18th century and...
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Sylvia Rose
Nov 85 min read
Chlorine (Cl): Properties, Hazards & Uses
Chlorine (Cl) is a vital element in nature, used in industry as a disinfectant. Characterized by its highly reactive habits, chlorine is...
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Sylvia Rose
Nov 85 min read
Carl Wilhelm Scheele: Poisonous Chemistry
Carl Wilhelm Scheele (1742 - 1786) is a self-taught German-Swedish chemist whose work has strong impact on chemical sciences of the day....
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Sylvia Rose
Nov 18 min read
11 Favorite Drawing Mediums of Artists
Drawing is a creative expression for humans since cave paintings of prehistory. In art, anything making a mark is a drawing tool....
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Sylvia Rose
Oct 294 min read
Powder of Algaroth: Antimony Oxychloride Purgative
Antimony oxychloride or Powder of Algaroth is a compound first appearing in 15th century Europe. During the Renaissance Powder of...
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Sylvia Rose
Oct 275 min read
Advances in Chemistry 1600-1800: German
Chemistry from 1600 to 1800 yields transformative discoveries influential today. In the German lands this era is characterized by...
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Sylvia Rose
Oct 278 min read
Scientific Revolution Europe 1543-1687
The Scientific Revolution, from 1543 to 1687, transforms human understanding of the natural world. This period involves events and...
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Sylvia Rose
Oct 265 min read
The Microscope: Antonie van Leeuwenhoek
Antonie van Leeuwenhoek (1632 - 1723) is a self-taught scientist whose work in microscopy revolutionizes medicine and other disciplines....
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Sylvia Rose
Jul 283 min read
Roger Bacon: Medieval Science & Alchemy
Roger Bacon (c. 1219 - 1292) is a Franciscan friar and fiery figure in medieval and later science and philosophy. He's known for his...
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Sylvia Rose
Oct 13, 20233 min read
Gnomes: Earth Spirits of Renaissance Mythology
Beloved in gardens, gnomes bring blessings of Earth. Thought to dwell in underground tunnels, caverns, soil and rocks, chthonic gnomes...
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Sylvia Rose
Jul 13, 20234 min read
Four Early German Inventions We Still Love Today
Coffee filters, gummi bears, guide dog school and refrigeration are among the German inventions of the 19th and early 20th centuries,...
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