Our navigation bar is loading . . .

Subscribe to JCSM's weekly inspirational message podcast!Write on Jason Gastrich's Facebook page!Add JCSM as a friend to your MySpace account!Watch Jason Gastrich's videos on YouTube!
Read, respond and subscribe to Jason Gastrich's blog!

Designate a portion of your next eBay auction to JCSM through eBay's Mission Fish program!JCSM's Top 1000 Christian Sites - Free Traffic Sharing Service!

Jesus Christ Saves Ministries

Helping San Diego, California and beyond since 1997

Please type your email and let us encourage you!

 
       
Search jcsm.org now!

Click here and add this page to your favorites!

Return to the JCSM Study Center!

Encyclopedia Britannica



PROUST, JOSEPH LOUIS (17541826)

This article appears in Volume V22, Page 490 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: PRE-PYR
PROUST, JOSEPH LOUIS (17541826) , French chemist, was born on the 26th of September 1754 at Angers, where his father was an apothecary. After beginning the study of
chemistry
  in his father's shop he came to Paris and gained the appointment of apothecary in
chief
  to the Salpetriere, also lecturing on
chemistry
  at the musk of the aeronaut J. F. Pilatre de Rozier, whom he accompanied in a
balloon
  ascent in 1784. Next, at the instance of Charles IV., he went to Spain, where he taught chemistry first at the artillery school of
Segovia
 , and then at Salamanca, finally becoming in 1789 director of the royal laboratory at Madrid. In 18o8 he lost both his position and his money by the fall of his patron, and retired first to Craon in Mayenne and then to Angers, where he died on the 5th of July 1826. His name is best known in connexion with a
long
  controversy with C. L. Berthollet. The latter chemist was led by his
doctrine
  of mass-action to deny that substances always combine in constant and definite proportions.,
Proust
 , on the other hand, maintained that compounds always contain definite quantities of their constituent elements, and that in cases where two or more elements unite to form more than one compound, the proportions in which they are present vary per saltum, not gradually. In 1799 he proved that carbonate of copper, whether natural or artificial, always has the same composition, and later he showed that the two oxides of tin and the two sulphides of iron always contain the same relative weights of their components and that no intermediate indeterminate compounds exist. His analytical skill enabled him to demonstrate the inaccuracy of the researches by which Berthollet attempted to support the opposite view, and to show among other things that some of the compounds which Berthollet treated as oxides were in reality hydrates containing chemically combined water, and the upshot was that by 18o8 he had fully vindicated his position.
Proust
  also investigated the varieties of
sugar
  that occur in sweet vegetable juices, distinguishing three kinds, and he showed that the
sugar
  in grapes, of which he announced the existence to his classes at Madrid in 1799, is identical with that obtained from honey by the Russian chemist J. T. Lowitz (17571804).
Besides papers in scientific
periodicals
  he published Indagaciones sobre el estan"ada de cobre, la vajilla de estano y el vidriado (1803); Memoire sur le
sucre
  de raisins (18o8); Recueil des memoires relatifs d la poudre a canon (1815) ; and Essai sur une des causes qui peuvent amener la formation du calcul (1824).


End of Article: PROUST, JOSEPH LOUIS (17541826)


If you wish, you can link directly to this article.
<a href="http://jcsm.org/StudyCenter/Encyclopedia/PRE_PYR/PROUST_JOSEPH_LOUIS_17541826_.html">
PROUST, JOSEPH LOUIS (17541826)
</a>


(Previous)
PROUST, ANTONIN (18321905)
(Next)
PROUSTITE



 

Jesus Christ Saves Ministries

The JCSM Study CenterAmerica's Christian FoundationSkeptic's Annotated Bible: Corrected and ExplainedNKJV Web Hosting and Services
JCSM's Sermons, Debates and the Bible on MP3The Online Christ-Centered MinistriesDo You Have A Web Site?  Your Ad Could Be Here!Seminary Notes and PapersThe Picturesque Photo Albums


Jesus Christ Saves Ministries, P.O. Box 70696, Pasadena, CA 91117

JCSM is a 501(c)(3), non-profit organization. Copyright © 1997-present.



Kingdom Debt Solutions - Be Debt Free! Sport Logos - Quality Athletic Equipment The JCSM Study Center Your Ad Could Be Here! Launch A Successful Internet Organization or Business! Learn Guitar, Bass, or Piano in San Diego county!

You can advertise your site right here!

Free & Cheap Cell Phones  |  Cheap Long Distance Phone Service Carriers  |  Talk America Local Phone Service  |  Ztel & MCI - Unlimited Long Distance
Compare Cell Phone Plans & Companies  | 
International Calling Cards & Prepaid Phone Cards  |  Voice Over IP Broadband Internet Phone Service  |  Wireless Phone Plans & Cheap Cell Phones

Dr. Jason Gastrich

Jason Gastrich, Ph.D.

 

Jesus Christ Saves Ministries is directed by Dr. Jason Gastrich. It was founded in 1997 and it exists to bring people into a life-changing and productive relationship with Jesus Christ. JCSM offers over 200,000 free web pages, including its weekly inspirational emails that have been sent continuously for over a decade.

Jesus Christ Saves Ministries
P.O. Box 9297
San Diego, CA  92169
1-877-850-3878 or Email

JCSM is a 501(c)(3), non-profit organization. Copyright © 1997-2009.

_____________________________________________________________________________

Online First Aid and CPR Certification  .  The Online Christ Centered Ministries  .  The Skeptic's Annotated Bible: Corrected and Explained  .  The Inerrancy Discussion Board  .  Free Email Accounts  .  Home Equity Loans  .  JasonGastrich.com  .  The Missions, Apologetics, and Creation Bible Conference  .  Young Earth Creation Science  .  San Diego Music Lessons  .  10,000 Wise Quotes and Spiritual Sayings  .  Gastrich.net  .  Maximizing the Internet: 12 Keys to Success  .  Louisiana Baptist University  .  NKJV Web Hosting and Services  .  Michael Newdow  .  San Diego Soccer Training  . Christian Guitar Lessons  .  Jesus Christ Saves Ministries  .  Eternal Security