Dolbear: 2 books

For thirty yearsor more the expressions “Correlation of the Physical Forces” and “The Conservation of Energy” have been common, yet few persons have taken the necessary pains to think out clearly what mechanical changes take place when one form of energy is transformed into another. Since...

In the past fifty years the advance in physical knowledge has not only been rapid, but it has been revolutionary. The fundamental principles of natural philosophy that were applied by Sir Isaac Newton and others to masses of visible magnitude have been applied to molecules; and it has thus been discovered...