June

12, 1002

Nature

A WEEKLY

ILLUSTRATED JOURNAL OF SCIENCE

June 12, 1902

Nature

A WEEKLY

ILLUSTRATED JOURNAL OF SCIENCE

VOLUME LXV

NOVEMBER 1901 to APRIL 1902

"To the solid ground

Of Nature trusts the mind which builds for aye."-WORDSWORTH

S
London

MACMILLAN AND CO., LIMITED