"A sacred spark created by his breath, The immortal mind of man his image bears; A spirit living 'midst the forms of d…"

"A small piece of pure ... was placed upon an insulated disk of platina, connected with the negative side of the batte…"

"You write with great eloquence and truth on the effects of mountain scenery on the mind. Whatever exalts the imaginat…"

"That the forms of natural bodies may depend upon different arrangements of the same particles of matter has been a fa…"

"Every new discovery may be considered as a new species of manufacture, awakening moral industry and sagacity, and emp…"

"Fortunately science, like that nature to which it belongs, is neither limited by time nor by space. It belongs to the…"

"It is surely a pure delight to know, how and by what processes this earth is clothed with verdure and life, how the c…"

"I envy no quality of the mind or intellect in others; not genius, power, wit, nor fancy; but, if I could choose what …"

"Nothing is so fatal to the progress of the human mind as to suppose that our views of science are ultimate; that ther…"

"The moment after, I began to respire 20 quarts of unmingled nitrous oxide. A thrilling, extending from the chest to t…"