Blue-grass blade. [volume] (Lexington, Ky.) 188?-19??, 1908-08-16

Our solar tides are about two-fifths OF
the lunar and the combined resistance OF
Solar and lunar iides retards the terres-
tiaI rotation about six seconds of longi-
tude per century, thereby increasing the
length of our day about two-fifths of one
second of time per century. This is about
three times the EFFECT which the solar
tides alone should have produced on Mars
and even this small amount must have been
continually reduced by the loss OF water.
Hence incalculable ages must have been
required to reduce the Marian rotation to
it's present length.
Mr.. Head continues:-
"Why should an intelligent people build
great canals to irrigate land that Is no
doubt under water when 1t is not frozen
solid?"
/ did not end do not suppose these water
ways to be great canals and reg to refer
our friend to my former paper for my ideas
on this point, and as TO being frozen solid
he is again referred to the same paper.
AS to the land being under water l call
his attention to the following facts:-
1. Waite, does not retain unchanged, IT.
regular forms as does land and would
therefore preclude the possibility of maps.
This is not the case with Mars.
g. If the land were entirely under
water, then would the water be entirely
under clouds or vapCr and the surface OF
the planet would he forever invisible as Is
the case with Venus and as Is not the case
with Mars.
Once more l quote friend Heald:-
even with a solid year of sunshine, the
surface of the planet could not have suffi-
cient warmth were it not for its close prox-
unity to its internal fire, inasmuch as the
sun only gives one-fifth as much light and
heat as at the EARTH
In my former paper, l showed that the
sun gives more than two-fifths as much
light and heat to Mars as to the earth, and
further l tried to show that this amount
is one tenth greater than the relative re-
quirement of the planet, which Is five mil
lion miles nearer the sun than 1t should
be to receive the same relative amount and
is therefore warmer to that extent than is
the earth, but, by some accident, this para
graph was omitted by the printers
AS to the internal fires of Mars, l fear
that friend Head has based his judgment
on insufficient data. He says the earth has
a crust forty miles thick. / venture the
assertion that II said crust were composed
of solid lead, it would have to be many
times that thickness in order to account for
the earths mean density which Is half that
of lead. A globe of less than eight thous-
and miles in diameter and weighing six
and half sextillion tons will require more
than forty mile crust and nOtwithstand-
ing its smaller size and weaker gravity, the
density of Mars is nearly three-foudths
that of the earth. Does this great density
indicate young and thin crusted planet?
Can q body of less than five thousand miles
in diameter, but weighing seven hundred
quintilion tons be supposed to have a
weakly confined liquid or gaseous interior
On the contrary, If the interior were of den
sity equal to that of Jupiter and the crust
of solid lead,t crust would have to be
more than three hundred miles In thick
ness. This means that as compared to its
gravity, it's density Is greater than that OF
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