服务承诺
资金托管
原创保证
实力保障
24小时客服
使命必达
51Due提供Essay,Paper,Report,Assignment等学科作业的代写与辅导,同时涵盖Personal Statement,转学申请等留学文书代写。
51Due将让你达成学业目标
51Due将让你达成学业目标
51Due将让你达成学业目标
51Due将让你达成学业目标私人订制你的未来职场 世界名企,高端行业岗位等 在新的起点上实现更高水平的发展
积累工作经验
多元化文化交流
专业实操技能
建立人际资源圈Washing_Machines
2013-11-13 来源: 类别: 更多范文
Washing Machines
Before washing machines were invented people removed dirt from their clothes by pounding them on rocks and washing them clean in the streams. Sand was used as a malleable cleaning stone for the clothes. Soap was eventually found at a place in Rome called Sapo Hill. People found ashes containing the fat of animals to have great cleaning powers.
The first washing "machine" was invented in 1797. Most people called it a scrub board because one would literally scrub the clothes clean. In 1874 William Blackstone decided to build a birthday present for his wife. It was a machine that removed and washed away dirt from clothes. It was made of a wooden tub in which there was a piece of wood with six wooden pegs glued in it. The inside tub looked like a milking stool. The stool moved back and forth with a handle and some gears. The dirty clothes were hooked on the pegs and moved through the hot soapy water. Mr. Blackstone started to build and sell his washers for $2.50 each. When word got out, the competition moved in fast. Most of the early washing machines cost less than $10.
In 1861 a
clothes, first, washing, washer, time, one, machine, wooden, water, tub, system, people, moved, machines, early, dirt, clean, build, wringer, washers, washed, using, types, type, through, stool, scrub, replaced, removed, pegs, out, new, invented, introduced, inside

