I Consider Nature A Vast Chemical Laboratory

I Have Had A Fairly Long Life, Above All A Very Happy One, And I Think That I Shall Be Remembered With Some Regrets And Perhaps Leave Some Reputation Behind Me. What More Could I Ask? The Events In Which I Am Involved Will Probably Save Me From The Troubles Of Old Age. I Shall Die In Full Possession Of My Faculties, And That Is Another Advantage That I Should Count Among Those That I Have Enjoyed. If I Have Any Distressing Thoughts, It Is Of Not Having Done More For My Family; To Be Unable To Give Either To Them Or To You Any Token Of My Affection And My Gratitude Is To Be Poor Indeed.

We May Lay It Down As An Incontestible Axiom, That, In All The Operations Of Art And Nature, Nothing Is Created; An Equal Quantity Of Matter Exists Both Before And After The Experiment; The Quality And Quantity Of The Elements Remain Precisely The Same; And Nothing Takes Place Beyond Changes And Modifications In The Combination Of These Elements. Upon This Principle The Whole Art Of Performing Chemical Experiments Depends: We Must Always Suppose An Exact Equality Between The Elements Of The Body Examined And Those Of The Products Of Its Analysis.

The Whole Art Of Making Experiments In Chemistry Is Founded On The Principle: We Must Always Suppose An Exact Equality Or Equation Between The Principles Of The Body Examined And Those Of The Products Of Its Analysis.

Vegetation Is The Basic Instrument The Creator Uses To Set All Of Nature In Motion.

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. . . .