Dmitri Mendeleev Professions : Chemist Born : February 8, 1834 Died : February 2, 1907 Browse All Authors Top 26 quotes by Dmitri Mendeleev The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties. Dmitri Mendeleev property elements weight Why do they [Americans] quarrel, why do they hate Negroes, Indians, even Germans, why do they not have science and poetry commensurate with themselves, why are there so many frauds and so much nonsense? Dmitri Mendeleev nonsense quarrels hate The edifice of science not only requires material, but also a plan. Without the material, the plan alone is but a castle in the air-a mere possibility; whilst the material without a plan is but useless matter. Dmitri Mendeleev castles air science The establishment of a law, moreover, does not take place when the first thought of it takes form, or even when its significance is recognised, but only when it has been confirmed by the results of the experiment. Dmitri Mendeleev law doe firsts We could live at the present day without a Plato, but a double number of Newtons is required to discover the secrets of nature, and to bring life into harmony with the laws of nature. Dmitri Mendeleev day harmony nature life I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom. Dmitri Mendeleev feeling you freedom responsibility Similar Authors Auguste Laurent chemist August Wilhelm von Hofmann chemist August Kekule chemist Ascanio Sobrero chemist Antoine Lavoisier chemist Antoine Bechamp chemist All Authors