In completing one discovery we never fail to get an imperfect knowledge of others.

The more elaborate our means of our common sense is, the less the common sense it becomes.

Could we have entered into the mind of Sir Isaac Newton, and have traced all the steps by which he produced his great works, we might see nothing very extraordinary in the process.

It is no use speaking in soft, gentle tones if everyone else is shouting.

But it is not given to every electrician to die in so glorious a manner as the justly envied Richmann.

I have procured air [oxygen] ... between five and six times as good as the best common air that I have ever met with.

Every man, when he comes to be sensible of his natural rights, and to feel his own importance, will consider himself as fully equal to any other person whatever