Nothing Is Lost, Nothing Is Created, Everything

In Performing Experiments, It Is Necessary... That They Be Simplified As Much As Possible, And That Every Circumstance That Could Complicate The Results Should Be Completely Removed.

It Required 85 Parts By Weight Of Oxygen And 15 Parts Of Hydrogen To Compose 100 Parts Of Water.

Nothing Is Lost, Nothing Is Created, Everything Is Transformed

The Art Of Drawing Conclusions From Experiments And Observations Consists In Evaluating Probabilities And In Estimating Whether They Are Sufficiently Great Or Numerous Enough To Constitute Proofs. This Kind Of Calculation Is More Complicated And More Difficult Than It Is Commonly Thought To Be. . . .

Experiments Upon Vegetation Give Reason To Believe That Light Combines With Certain Parts Of Vegetables, And That The Green Of Their Leaves, And The Various Colors Of Flowers, Is Chiefly Owing To This Combination.