John Dalton

The ultimate particles of all simple bodies are indivisible and indestructible, and are of the same size and weight, but differ from those of other simple bodies in their electronegativity.

The ultimate particles of all simple bodies are indivisible and indestructible, and are of the same size and weight, but differ from those of other simple bodies in their electron affinity.

The ultimate particles of all simple bodies are indivisible and indestructible, and are of the same size and weight, but differ from those of other simple bodies in their metallic character.

The ultimate particles of all simple bodies are indivisible and indestructible, and are of the same size and weight, but differ from those of other simple bodies in their non-metallic character.

The ultimate particles of all simple bodies are indivisible and indestructible, and are of the same size and weight, but differ from those of other simple bodies in their metalloid character.

I am now going to give you a short account of my present situation. I have been at Kendal for a fortnight, and have been very busy in making experiments on the specific gravity of gases.

I have been very much engaged with my experiments on the absorption of gases by water, and have made some progress in them.

I am now fully convinced that the ultimate particles of all homogeneous bodies are perfectly alike in weight, figure, etc. In other words, every particle of water is like every other particle of water; every particle of hydrogen is like every other particle of hydrogen, etc.

I have been much engaged in the investigation of the specific gravities of gases, and have made some progress in them.

I am now engaged in writing a new system of chemical philosophy, which I hope will be of some use to the world.

I have been very busy in making experiments on the specific gravity of gases, and have made some progress in them.

I am now fully convinced that the ultimate particles of all homogeneous bodies are perfectly alike in weight, figure, etc.

I see no reason to doubt that the principles of chemical combination, which I have laid down, are founded on the most solid basis.

No new creation or destruction of matter is comprehended in the chemical changes which are daily taking place.

The great object of chemical philosophy is to determine the number and weight of the ultimate particles of all simple and compound bodies, and the manner in which they are united.

I have been much gratified by the attention paid to my lectures, and by the candid manner in which my opinions have been received.

The cause of the difference in the specific gravity of gases is to be sought in the different weights of their ultimate particles.

I am not aware that any other person has attempted to define the relative weights of the ultimate particles of bodies.

Chemical analysis and synthesis go no farther than to the separation of particles one from another, and to their reunion.

The most important part of my theory is that which relates to the relative weights of the ultimate particles of bodies.