to some substance
in solution, they recognized what they had always heard described on
earth as the bands of Jupiter, encircling the planet with great belts,
the colour varying with the latitude. At about latitude forty-five
these bands were purple, farther south light olive green, and at the
equator a brown orange. Shortly after they swung across the equator
the ocean again became purple, and at the same time a well-defined and
very brilliant white spot came into view. Its brightness showed slight
variations in intensity, though its general shape remained unchanged.
It had another peculiarity, in that it possessed a fairly rapid motion
of its own, as it moved eastward across the surface of the ocean. It
exhibited all the phenomena of the storm they had watched in crossing
Secretary Deepwaters Bay, but covered a larger area, and was far more
violent. Their glasses showed them vast sheets of spray driven along
at tremendous speed, while the surface was milky white.

"This," said Bearwarden, picking up a book, "solves to my mind the
mystery of the white spot described by the English writer Chambers, in
1889, as follows:

"'During the last few years a brilliant white spot has been visible on
the equatorial border of the great southern belt. A curious fact in
connection with this spot is, that it moves with a velocity of some two
hundred and sixty miles per hour greater than the red spot. Denning
obtained one hundred and sixty-nine observations of this bright marking
during the years 1880-1883, and determined the period as nine hours,
fifty minutes, eight and seven tenths seconds (five and a half minutes
less than that of the red spot). Although the latter is now somewhat
faint, the white spot gives promise of remaining visible for many
years. During the year 1886 a large number of observations of Jupiter
were made at the Dearborn Observatory, Chicago, U. S., by Prof. G. W.
Hough, using the eighteen-and-a-half-inch refractor of the observatory.
Inasmuch as these observations are not only of high intrinsic interest,
but are in conflict, to some extent, with previous records, a somewhat
full abstract of them will be useful: The object of general interest
was the great red spot. The outline, shape, and size of this
remarkable object has remained without material change from the year
1879, when it was first observed here, until the present time.
According to our observations, during the whole of this period it has