No one nor anything can silence me.

If all the elements are arranged in the order of their atomic weights, a periodic repetition of properties is obtained. This is expressed by the law of periodicity.

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

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.

No one nor anything can silence me.

It is the function of science to discover the existence of a general reign of order in nature and to find the causes governing this order. And this refers in equal measure to the relations of man - social and political - and to the entire universe as a whole.

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