Jean-louis Dumas Quotes & Sayings

In chemistry, our theories are crutches; to show that they are valid, they must be used to walk ... A theory established with the help of twenty facts must explain thirty, and lead to the discovery of ten more. — Jean-Baptiste Dumas

I have seen many phases of life; I have moved in imperial circles, I have been a Minister of State; but if I had to live my life again, I would always remain in my laboratory, for the greatest joy of my life has been to accomplish original scientific work, and, next to that, to lecture to a set of intelligent students. — Jean-Baptiste Dumas

In inorganic chemistry the radicals are simple; in organic chemistry they are compounds - that is the sole difference. — Jean-Baptiste Dumas

In organic chemistry there exist certain types which are conserved even when, in place of hydrogen, equal volumes of chlorine, of bromine, etc. are introduced. — Jean-Baptiste Dumas

The chemical compounds are comparable to a system of planets in that the atoms are held together by chemical affinity. They may be more or less numerous, simple or complex in composition, and in the constitution of the materials, they play the same role as Mars and Venus do in our planetary system, or the compound members such as our earth with its moon, or Jupiter with its satellites ... If in such a system a particle is replaced by one of different character, the equilibrium can persist, and then the new compound will exhibit properties similar to those shown by the original substance. — Jean-Baptiste Dumas

Immediately, and according to custom, the ramparts of Fort Saint-Jean were covered with spectators; it is always an event at Marseilles for a ship to come into port, especially when this ship, like the Pharaon, has been built, rigged, and laden at the old Phocee docks, and belongs to an owner of the city. — Alexandre Dumas