Despotism has forever had a powerful hold upon the world. Autocratic government, not self-government, has been the prevailing state of mankind. The record of past history is the record, not of the success of republics, but of their failure.
Calvin CoolidgeWhenever Nature's bounty is in danger of exhaustion, the chemist has sought for a substitute. The conquest of disease has made great progress as a result of your efforts. Wherever we look, the work of the chemist has raised the level of our civilization and has increased the productive capacity of the nation. Waste materials, formerly cast aside, are now being utilized.
Calvin Coolidge