water, the air, and fire, and of their qualities and properties, and of
the generation and corruption of things made of the commixtion of them.

Of certain conclusions proving that the earth must needs be round, and
that it hangeth in the midst of the firmament, and that it is in
circumference above 21,000 miles.

Of certain conclusions proving that the sea lieth round upon the earth.

Of certain points of cosmography, as how and where the sea covereth the
earth, and of divers strange regions and lands, and which way they lie;
and of the new-found lands, and the manner of the people.

Of the generation and cause of stone and metal, and of plants and herbs.

Of the generation and cause of well-springs and rivers; and of the cause
of hot fumes that come out of the earth; and of the cause of the baths of
water in the earth, which be perpetually hot.

Of the cause of the ebb and flood of the sea.

Of the cause of rain, snow, and hail.

Of the cause of the winds and thunder.

Of the cause of the lightning, of blazing stars, and flames flying in the
air.