Cavendish was a great Man with extraordinary singularities-His voice was squeaking his manner nervous He was afraid of strangers & seemed when embarrassed to articulate with difficulty-He wore the costume of our grandfathers. Was enormously rich but made no use of his wealth... He Cavendish lived latterly the life of a solitary, came to the Club dinner & to the Royal Society: but received nobody at his home. He was acute sagacious & profound & I think the most accomplished British Philosopher of his time.

I suppose there was never yet a woman who had not somewhere set up on a pedestal in her brain an ideal of manhood. ... He never is finished till the brain of his creator ceases to work, till she has added her last touch to him, and has laid down the burden of life and gone elsewhere, perhaps to some happy land where ideals are more frequently realised than ever happens here.

Experimental science hardly ever affords us more than approximations to the truth; and whenever many agents are concerned we are in great danger of being mistaken.

Mr. Dalton's permanent reputation will rest upon his having discovered a simple principle, universally applicable to the facts of chemistry - in fixing the proportions in which bodies combine, and thus laying the foundation for future labors... his merits in this respect resemble those of Kepler in astronomy.

Geology, perhaps more than any other department of natural philosophy, is a science of contemplation. It requires no experience or complicated apparatus, no minute processes upon the unknown processes of matter. It demands only an enquiring mind and senses alive to the facts almost everywhere presented in nature. And as it may be acquired without much difficulty, so it may be improved without much painful exertion.

James Watt was equally distinguished as a natural philosopher and chemist; his inventions demonstrate his profound knowledge of those sciences, and that peculiar characteristic of genius - the union of them for practical application.

I have learned more from my mistakes than from my successes.