Transcribed below. The typewriter is a 1963 Tower Constellation, made by Smith-Corona for Sears Roebuck, with Elite Gothic type. It is possibly unique in the world, since Elite Gothic was not offered as an option in the Sears catalogue, so this one had to be a special order from a serious and determined typist.

A SERIOUS TALK.

VERSE THAT IS TOO SWEET AND FRAGRANT,
JINGLY RHYMES THAT ARE TOO FLAGRANT
MAKE MY HEAD ACHE, THOUGH I MAY GRANT
THEY WOULD ENTERTAIN A VAGRANT.

I AM VERY, VERY SERIOUS.
I FIND HUMOR TOO MYSTERIOUS.
LOWER CASE MAKES ME DELIRIOUS.
I AM VERY, VERY SERIOUS.