https://padlet.com/sy40441/hw0vpj1y4174 By Shiquan Yu en-us 2017-09-11 19:21:42 UTC 2025-10-23 00:19:22 UTC hello@padlet.com sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187259444 -It helps separate cotton from its seeds.
-This machine revolutionized the cotton industry of the South. After the invention of the cotton gin, the yield of raw cotton doubled each decade after 1800.


source:https://en.wikipedia.org/wiki/Cotton_gin]]> 2017-09-13 16:41:58 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187259444 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187274577 2017-09-13 17:11:56 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187274577 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187278795 -Old Farmer's Almanac is a reference book that contains weather forecasts, tide tables, planting charts, astronomical data, recipes, and articles on a number of topics, including gardening, sports, astronomy, and farming. The Almanac also features anecdotes and a section that predicts trends in fashion, food, home décor, technology, and living for the coming year.
-As a reference book, it helps americans improve their lives in many aspects.


source: https://en.wikipedia.org/wiki/Old_Farmer%27s_Almanac]]> 2017-09-13 17:20:13 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187278795 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187282022 2017-09-13 17:26:38 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187282022 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187282808 -As a stove, it produces more heat and less smoke than an ordinary open fireplace.
- It had a hollow baffle near the rear (to transfer more heat from the fire to a room's air) and relied on an "inverted siphon" to draw the fire's hot fumes around the baffle.

source: https://en.wikipedia.org/wiki/Franklin_stove]]> 2017-09-13 17:28:09 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187282808 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187285026 2017-09-13 17:32:19 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187285026 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187286890 2017-09-13 17:36:18 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187286890 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187288127 -Jefferson's moldboard had a further advantage than others.
-It could plow a stony field without breaking. It was highly successful in the eastern United States, but less effective against the clay soils and sod of the Midwest.

source: https://www.monticello.org/site/plantation-and-slavery/moldboard-plow]]> 2017-09-13 17:38:55 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187288127 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187290262 2017-09-13 17:43:19 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187290262 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187290734 -It was a new weapon which could move and attack under the water during the American Revolutionary War
-Although the first submarine failed, the existence of submarine had changed how naval battle works.

source: https://en.wikipedia.org/wiki/History_of_submarines]]> 2017-09-13 17:44:10 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187290734 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187295606 2017-09-13 17:53:30 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187295606 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187296084 -A match is a tool for starting a fire.
-The modern matches consisted of wooden splints or sticks of cardboard coated with sulphur and tipped with a mixture of sulphide of antimony, chlorate of potash, and gum. The treatment with sulphur helped the splints to catch fire, and the odor was improved by the addition of camphor. They were much safer and more efficient.

source: https://en.wikipedia.org/wiki/Match]]> 2017-09-13 17:54:31 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187296084 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187300115 2017-09-13 18:03:10 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187300115 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187300520 -A typewriter is a mechanical or electromechanical machine for writing characters similar to those produced by printer's movable type.
-The typewriter quickly became an indispensable tool for practically all writing other than personal handwritten correspondence. It was widely used by professional writers, in offices, and for business correspondence in private homes.


source: https://en.wikipedia.org/wiki/Typewriter]]> 2017-09-13 18:04:01 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187300520 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187301737 2017-09-13 18:06:23 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187301737 sy40441 https://padlet.com/sy40441/hw0vpj1y4174/wish/187302302 -The first reapers cut the standing grain and, with a revolving reel, swept it onto a platform from which it was raked off into piles by a man walking alongside.
-The invention of two successful reaping machines  brought about an end to hours of tedious field work and encouraged the invention and manufacture of other labor-saving farm implements and machinery.

source:https://www.thoughtco.com/cyrus-mccormick-mechanical-reaper-1991634]]> 2017-09-13 18:07:31 UTC https://padlet.com/sy40441/hw0vpj1y4174/wish/187302302