At the meeting of the Chemical club last evening Mr. Crawley read a very interesting paper on the principal theories of the construction of matter. The first thing in regard to the construction of matter of which we have any account is what may be called the "substantia" theory which maintains that all matter had for its basis a certain principle, a substance, and the various forms in which matter exists are the results of different influences brought to bear upon the primary substance. This theory was superseded by the four element theories of the school of Aristotle which taught that all matter was the result of the combination of tire, water, earth and air This theory held during the Middle Ages and was the inspiration of the Alchemists who thought that, since all the metals were composed of these four elements and no others, it would be possible to convert the baser metals into the precious ones by a simple change. The decomposition of water by Lavasier, of course, broke up this theory, since one of the supposed elements was compound, and not an element in itself. Very soon after this we have the Daultorian theory of atoms which is our modern chemical theory.
Boylston Chemical Club.
Who Can Be ‘Racist’?
Harvard-Affiliated Hedge Fund to Shut Down
‘With Us or Against Us’: Current, Former Winthrop Affiliates Say Faculty Deans Created a Toxic Environment Stretching Back Years
Baseball Wins Ivy Championship, Advances to NCAA Tournament for First Time Since 2005
Harvard President Bacow Receives Honorary Degree at Yale Commencement
From Our Advertisers
The comprehensive resource for navigating the job search, composing strong resumes and cover letters, performing at interviews, using Harvard’s Campus Interview Program, and profiles from alumni in different industries.
To Han, the Boston Marathon isn’t just a race. Follow one Harvard student on her life-changing experience from start to finish.
Harvard Innovation Labs invites you to apply to the Ingenuity Awards!
With Gmelius it’s possible to seize every day, no matter how busy you might be.