The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.

Knowing how contented, free, and joyful is life in the world of science, one fervently wishes that many would enter its portals.

There exists everywhere a medium in things, determined by equilibrium.

The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.

The elements which are the most widely diffused have small atomic weights.

When the elements are arranged in vertical columns according to increasing atomic weight, so that the horizontal lines contain analogous elements again according to increasing atomic weight, an arrangement results from which several general conclusions may be drawn.

Certain characteristic properties of elements can be foretold from their atomic weights.