8 ideas
13432 | The essence of a circle is the equality of its radii [Leibniz] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
12696 | Bodies are recreated in motion, and don't exist in intervening instants [Leibniz] |
17402 | Mendeleev saw three principles in nature: matter, force and spirit (where the latter seems to be essence) [Mendeleev, by Scerri] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |
17399 | Elements don't survive in compounds, but the 'substance' of the element does [Mendeleev] |
17400 | Mendeleev focused on abstract elements, not simple substances, so he got to their essence [Mendeleev, by Scerri] |
17401 | Mendeleev had a view of elements which allowed him to overlook some conflicting observations [Mendeleev] |