User:Pathoschild/Projects/Main page

From Wikisource
Jump to: navigation, search
 

Welcome to Wikisource,

the free library that anyone can edit.
Categories · Help pages · Site index Community discussion · Donations · Community portal
Carl Spitzweg 021.jpg Wikisource is an online library of free content publications (see the inclusion policy) collected and maintained by the community. See the help pages for information on getting started and the community portal for ways you can help. Feel free to ask questions at the community discussion page or experiment in the sandbox.
Main categories
New texts

Day, a Pastoral (1814)
 by John Cunningham
What Maisie Knew (1897)
 by Henry James
The Rainbow (1915)
 by D. H. Lawrence
Rainbow Valley (1919)
 by L. M. Montgomery
Inaugural lecture on The Study of History (1906)
 by Charles William Chadwick Oman
The Green Rust (1920)
 by Edgar Wallace
Memorandum regarding Military Strength of the Soviet Union (1938)
 by Philip R. Faymonville

Featured text

Download this featured text as an EPUB file. Download this featured text as a RTF file. Download this featured text as a PDF. Grab a download!

"The Discovery of Radium" by Marie Skłodowska Curie.

On 14 May, 1921, Marie Curie delivered "the only extended address which she made" on her visit that year to the United States. The Discovery of Radium is that address, descibing to those assembled at Vassar College of her Nobel Prize winning discovery of the chemical element radium despite the twin challenges of of tremendous difficulties and limited resources.

Marie Curie c1920.jpg

I could tell you many things about radium and radioactivity and it would take a long time. But as we can not do that, I shall only give you a short account of my early work about radium. Radium is no more a baby, it is more than twenty years old, but the conditions of the discovery were somewhat peculiar, and so it is always of interest to remember them and to explain them.

We must go back to the year 1897. Professor Curie and I worked at that time in the laboratory of the school of Physics and Chemistry where Professor Curie held his lectures. I was engaged in some work on uranium rays which had been discovered two years before by Professor Becquerel. I shall tell you how these uranium rays may be detected. If you take a photographic plate and wrap it in black paper and then on this plate, protected from ordinary light, put some uranium salt and leave it a day, and the next day the plate is developed, you notice on the plate a black spot at the place where the uranium salt was. This spot has been made by special rays which are given out by the uranium and are able to make an impression on the plate in the same way as ordinary light.

Read on...

or see all featured texts.

Wikisource's sister projects

WIKIMEDIA FOUNDATION

Wikisource is hosted by the Wikimedia Foundation, a non-profit organization which also hosts other free-content projects:
Commons-logo.svg Wikibooks-logo.svg Wikidata-logo.svg Wikinews-logo.svg Wikipedia-logo-v2.svg Wikiquote-logo.svg Wikispecies-logo.svg Wikiversity-logo.svg Wikivoyage-Logo-v3-icon.svg Wiktionary-logo.svg Wikimedia Community Logo.svg
Commons Wikibooks Wikidata Wikinews Wikipedia Wikiquote Wikispecies Wikiversity Wikivoyage Wiktionary Meta-Wiki
Imagine a world in which every single human being can freely share in the sum of all knowledge. That's our commitment. And we need your help: Contribute to our projects, or make a donation. Donations are primarily used for site maintenance and software improvements.

Wikisource languages

This is the English language Wikisource, which was started in 2001. It currently contains 582,568 articles. Wikisources are also being written in many other languages; for a full list, see the Multilingual Wikisource.