Q.e.d.

[A]fter the same manner S and U are proved to be equal, therefore the square of CB is equal to the square of the 2 other sides Q E D.

Now let any right line meet four harmonicals in A, C, B, D, and if those harmonicals be parallel, the thing is evident; but, if they intersect in V, draw ECF parallel to VD, the line most remote from C; then, by the first part, EC#61;CF, and AD#58;AC#58;#58;VD#58;EC or CF. Therefore AD#58;AC#58;#58;BD#58;CB. q. e. d.

By Cases 1 and 2, we see that any finite collection of 4k-1 primes cannot contain all such primes. Thus there are infinitely many primes of this type. ¶ Q.E.D.

That this part of the world has actually been peopled (Q. E. D.) to support which, we have living proofs in the numerous tribes of Indians that inhabit it.

PROP[OSITION] VI. One substance cannot be produced by another substance. ¶ Demonst[ration]. In the preceding proposition we have seen that there cannot in the nature of things be two Substances of the same attribute, or that they have anything in common (by Prop. II.); and so (by Prop. III.) one cannot be the cause of, or be produced by, another: q. e. d.

Of all those on the market, Eastman's is the only one with a solution tight, locking cover. ¶ Q. E. D.

We all go in for the dolce here except you, and you're such a patent machine for turning out Q.E.D.s by the dozen, that you can no more help working than the bedmaker can help taking my tea and saying the cat did it,[…]

The same thing, I believe, that was lacking in Let Freedom Ring—lack of dramatic integration, lack of dramatic intensity, lack of all those elements, call them what you will, which make a play a play and not a tract, and certainly not a Q.E.D. thesis.

Now let any right line meet four harmonicals in A, C, B, D, and if thoſe harmonicals be parallel, the thing is evident; but, if they interſect in V, draw ECF parallel to VD, the line moſt remote from C; then, by the firſt part, EC#61;CF, and AD#58;AC#58;#58;VD#58;EC or CF. Therefore AD#58;AC#58;#58;BD#58;CB. q.e.d.

Prop[osition] VI. One substance cannot be produced by another substance. Demonst[ration]. In the preceding proposition we have seen that there cannot in the nature of things be two Substances of the same attributes, or that they have anything in common (by Prop. II.); and so (by Prop. III.) one cannot be the cause of, or be produced by, another: q.e.d.