James Prescott Joule

Physics England 1818 – 1889 100 quotes

English physicist who experimentally determined the mechanical equivalent of heat, foundational to the first law of thermodynamics.

Quotes by James Prescott Joule

Electricity and magnetism are intimately connected with heat.

Paper 1840

The conservation of energy is a fundamental law of the universe.

Scientific Address 1847

Experiment is the best test of truth in science.

Interview

The world is a grand laboratory for the scientist.

Speech 1850

Heat is motion, and motion is life.

On Heat 1845

Precision in measurement is the soul of science.

Experimental Notes 1843

The unity of nature's forces is a profound truth.

Letter 1850

I have no patience with those who say the world is not rational.

Personal Correspondence

The paddle-wheel experiment proved the equivalence of heat and work.

Key Passage 1845

God has ordered all things in heaven and on earth.

Reflection 1880

Curiosity is the engine of discovery.

Speech Excerpt

The calorie is a measure of energy's transformation.

Paper 1849

In the quiet of the laboratory, truths are unveiled.

Personal Note

Magnetism generates heat through motion.

Early Work 1840

The second law of thermodynamics reveals nature's direction.

On Heat Engines 1850

Life's warmth comes from the sun's energy.

Reflection on Life

Accuracy in science demands relentless pursuit.

Letter 1845

The universe operates on principles of conservation.

Scientific Memoir 1847

Brewing beer taught me the value of precise measurement.

Autobiographical Note 1830

Electricity's spark ignites scientific wonder.

Early Paper 1838