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Many early molecatchers set out snares for the moles, taking care to remove human scent from the loops. Over time, traps used to catch and kill moles became more advanced and complicated, incorporating weighted wood or cast iron, and eventually sprung steel. A mole killed by a spring trap. Some itinerant molecatchers travelled from farm to farm.
Whitewash, calcimine, kalsomine, calsomine, or lime paint is a type of paint made from slaked lime (calcium hydroxide, Ca(OH) 2) or chalk (calcium carbonate, CaCO 3), sometimes known as "whiting". Various other additives are sometimes used.
Decoupage or découpage ( / ˌdeɪkuːˈpɑːʒ /; [ 1] French: [dekupaʒ]) is the art of decorating an object by gluing colored paper cutouts onto it in combination with special paint effects, gold leaf, and other decorative elements. Commonly, an object like a small box or an item of furniture is covered by cutouts from magazines or from ...
Star-nosed mole. The star-nosed mole ( Condylura cristata) is a small semiaquatic mole found in moist, low elevation areas in the northern parts of North America. [ 3] It is the only extant member of the tribe Condylurini and genus Condylura, and it has more than 25,000 minute sensory receptors in touch organs, known as Eimer's organs, with ...
Silica fume, also known as microsilica, (CAS number 69012-64-2, EINECS number 273-761-1) is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 nm.
Stoichiometry. A stoichiometric diagram of the combustion reaction of methane. Stoichiometry ( / ˌstɔɪkiˈɒmɪtri /) is the relationship between the weights of reactants and products before, during, and following chemical reactions . Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the ...
In 1875, Sherwin-Williams started selling ready-mixed paint. [3] Previously, consumers bought paint ingredients that they themselves would mix together. [3] In the 1940s, Sherwin-Williams introduced Kem-Tone, a water-based fast-drying interior paint. [3] In 1996, the American Chemical Society named the product a National Historic Chemical Landmark.
Portland cement clinker was first made (in 1825) in a modified form of the traditional static lime kiln. [2] [3] [4] The basic, egg-cup shaped lime kiln was provided with a conical or beehive shaped extension to increase draught and thus obtain the higher temperature needed to make cement clinker. For nearly half a century, this design, and ...