also possible
on another, depending upon that planet's type of civilization and real
knowledge, not superficial theory:

"Recently a cable dispatch from Rome brought the announcement that
Prof. Maiorana discovered that lead balls swimming on a pool of mercury
lost a certain amount of weight. It was explained that the weight was
lost due to a screening effect which the mercury produced on the lead
balls. In other words, mercury acts as a sort of insulator against the
earth's gravitational waves. For gravitation certainly is propagated
the same as other forms of energy, i.e., in wave form. Prof. T. J.
See, famous investigator of Mare Island, California, in an address
before the California Academy of Sciences, announced recently that his
researches on gravitation in 1917 and his latest researches on
molecular forces confirmed Maiorana's claim that the screening of
gravitation has been shown to exist. In 1917, says Professor See, 'I
explained the fluctuation of the Moon's main motion by the circular
refraction of the sun's gravitation waves, as they are propagated
through the solid body of our earth at the time of lunar eclipses.'

"'I found also from dealings with capillary forces that quicksilver is
indeed very resistant to the waves which produce molecular action, and
this developed a new theory of the depression of the mercury in
capillary tubes. This would tend to confirm Maiorana's claim that a
basin of mercury beneath a suspended mass of lead may decrease the
gravitation of the lead by a small amount. My researches on ether show
conclusively that gravitation is due to waves in the ether, and certain
very resistant bodies in the line of action may thus introduce a slight
screening effect.'

"This reasoning opens up new avenues of thought of what may be
accomplished in the future when we have found a perfect screen against
gravitation."

CHAPTER XII.

EDUCATION AND TRAINING OF THE INDIVIDUAL, VOCATIONAL DETERMINATION,
SCHOOL AGE, MARRIAGE AND SCIENCE (Continued)

Everyone goes to school until the age of 16, that is, the length of
time on Mars would correspond to 32 years on your Earth. The Martian
year is nearly twice as long as on your globe.

There are many universities on Mars where students enter direct from
their homes, where the primary and preparatory education is first
inculcated in their minds. Wonderful teachers have charge of the
students, and many truths not yet known on your Earth are