Carl Wilhelm Scheele

It is the greatest pleasure to discover something new, and to be able to demonstrate it to others.

The air consists of two elastic fluids, one of which is absorbed by burning bodies, and the other not.

Fire is a compound substance, consisting of phlogiston and heat.

The acid of sugar is a distinct acid, and not a modification of tartaric acid.

I have found a new acid in milk, which I call lactic acid.

Manganese contains a new metallic earth, which I call terra ponderosa.

The green color of plants is due to a peculiar substance, which I call chlorophyll.

I have discovered a new acid in apples, which I call malic acid.

The acid of lemons is a distinct acid, and not a modification of tartaric acid.

I have found a new acid in gallnuts, which I call gallic acid.

The air we breathe is not a simple substance, but a mixture of different elastic fluids.

Phlogiston is a principle of inflammability, which is present in all combustible bodies.

Heat is a subtle fluid, which can be transferred from one body to another.

The acid of salt is a distinct acid, and not a modification of vitriolic acid.

I have discovered a new acid in urine, which I call uric acid.

The acid of phosphorus is a distinct acid, and not a modification of vitriolic acid.

I have found a new acid in cranberries, which I call benzoic acid.

The acid of prussic acid is a distinct acid, and not a modification of vitriolic acid.

I have discovered a new acid in arsenic, which I call arsenic acid.

The acid of tungsten is a distinct acid, and not a modification of vitriolic acid.