忘记密码

Thomas Edison Had a Crush on Iron

2020-06-29 23:00 作者: 来源: 本站 浏览: 7 views 我要评论 字号:

摘要: “The remarkable process of crushing and magnetic separation of iron ore at Mr. Thomas Edison’s works in New Jersey shows a c...

“The remarkable process of crushing and magnetic separation of iron ore at Mr. Thomas Edison’s works in New Jersey shows a characteristic originality and freedom from the trammels of tradition. The rocks of iron ore are fed through 70-ton ‘giant rolls’ that can seize a 5-ton rock and crunch it with less show of effort than a dog in crunching a bone. After passing through several rollers and mesh screens, the finely crushed material falls in a thin sheet in front of a series of magnets, which deflect the magnetic particles containing iron. This is the latest and most radical development in mining and metallurgy of iron.”

Scientific American, January 1898

More gems from Scientific American’s first 175 years can be found on our anniversary archive page.

Let's block ads! (Why?)

发表评论

*

* (保密)

😉 😐 😡 😈 🙂 😯 🙁 🙄 😛 😳 😮 mrgreen.png 😆 💡 😀 👿 😥 😎 ➡ 😕 ❓ ❗

Ctrl+Enter 快捷回复

会员登录关闭

记住我 忘记密码

注册会员关闭

小提示: 您的密码会通过填写的"电子邮箱"发送给您.

 

You need to log in to vote

The blog owner requires users to be logged in to be able to vote for this post.

Alternatively, if you do not have an account yet you can create one here.