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Mining and quarrying of granite and gravel 2 Artisanal gold mining and processing 179 Harvesting sand 9 Construction including making bricks and carrying construction materials 27 Services. Domestic work 2710-12 Collecting money on public buses washing cars and automotive repair 7101113
In Boston around 1700 Thomas Child built the earliest American paint mill a granite trough within which a 1.6 foot .5 meter granite ball rolled grinding the pigment. The first paint patent was issued for a product that improved whitewash a water-slaked lime often used during the early days of the United States.
Plaster is a mix of white cement white sand or marble aggregate and water. The pool builders apply the plaster to the concrete pool structure using a flat round-edged trowel see image below . Although usually white plaster can be dyed different colors .