Find number abc
If c9156 - 211ab = 28ac9 find number abc. Multiple solutions may exist.Correct answers: 77
The first user who solved this task is Squazz Muntbacker.
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Sewing MachineIn 1790, Thomas Saint, a London cabinet maker, patented possibly the first sewing machine, fitted with an awl that makes a hole in leather and allows a needle to pass through it. This machine made a chain stitch with a tambour-type needle to produce a mechanical crochet or chain stitch. No evidence exists that Saint produced a single machine, and those who in the 1880's followed his patent specifications failed. An earlier English patent (24 Jun 1755) by German mechanic, Charles Weisenthal, had described a two-pointed needle for mechanical sewing, but there was no mention of a machine to go with it.Image: Wilcox-Gibbs sewing machine, c.1890. |