I have imagined and executed a mould-board which may be mathematically demonstrated to be perfect, as far as perfection depends on mathematical principles ... it is on the principle of two wedges combined at right angles, the first in the direct line of the furrow to raise the turf gradually, the...

I am among those who think well of the human character generally. I consider man as formed for society, and endowed by nature with those dispositions which fit him for society. I believe also ... that his mind is perfectible to a degree of which we cannot as yet form any conception. it is...

further trial of the Stylograph convinces me it can never take the place of the Polygraph but with travellers, as it is so much more portable. the fetid smell of the copying paper would render a room pestiferous, if filled with presses of such papers.

altho’ much of a sceptic in the practice of medecine, I read with pleasure it’s ingenious theories.

if nature has made any one thing less susceptible, than all others, of exclusive property, it is the action of the thinking power called an Idea; which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of...

I am a friend to the reformation generally of whatever can be made better

when I contemplate the immense advances in science, and discoveries in the arts which have been made within the period of my life, I look forward with confidence to equal advances by the present generation; and have no doubt they will consequently be as much wiser than we have been, as we than...

Th: Jefferson recieved yesterday Mr Mantz’s present of very handsomely dressed leather, for which he begs leave to return him his thanks, and to express the pleasure he recieves from new discoveries and advances in the ar useful arts. those who by che new processes cheapen the comforts of life...

literature is not yet a distinct profession with us. now and then a strong mind arises, and at it’s intervals of leisure from business, emits a flash of light. but the first object of young societies is bread and covering; science is but secondary and subsequent.