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By 1917, they sold chemistry sets, which they produced through World War II, in spite of restrictions on materials. Robert Treat Johnson, noting the number of chemistry students at Yale whose interest in the science began with a chemistry set, argued the production of chemistry sets was a "patriotic duty." [5]
The depiction of chemistry on stamps began in 1923 with the issue of a set of definitive French stamps commemorating the chemist and microbiologist Louis Pasteur. [1] Another early chemical stamp depicted the botanist and chemist Herman Boerhaave . [ 2 ]
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Porter Chemical Company was an American toy manufacturer that developed and produced chemistry sets aimed as educational toys for aspiring junior scientists. The company's Chemcraft kits were first sold at major retail by Woodward & Lothrop, and appeared soon after at other retailers in the country.
It also produced crafts plaster moulding sets Frog & Owl. [2] Thomas Salter Ltd. was founded in London in 1913, moved to Glenrothes, Fife, and closed in 1992. [3] Chemistry sets from Salter Science included a various number of chemicals, which were numbered, so that the numbers were the same across the sets. Some of the chemicals included were:
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Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.