"Wait," cautioned Professor Roumann. "First we must see if we can
breathe on the moon, and whether the temperature will support life. I
must make some tests before we venture out of the projectile."




CHAPTER XIX

TORCHES OF LIFE


The natural inclination of the boys to rush out on the surface of the
moon to see what it was like was checked by the words of caution from
Professor Roumann.

"Do you think it would be dangerous to venture outside the projectile?"
asked Jack, as he looked from the window and noted the rugged, uneven
surface of the moon.

"Very much so," was the answer. "According to most astronomers, there
is absolutely no air on the moon, also no moisture, and the temperature
is either very high or around the freezing point. We must find out what
it is."

"How can we?" inquired Mark.

"I'll soon show you," went on the German. "Professor Henderson, will
you kindly assist me."