, 1910, number of Physical Training tells his
experience in studying nature with several groups of boys.

"The night sounds surrounding a camp in northern Minnesota were a puzzle
to boys and to the counsellor of the tent at the end of the row. This
problem continued unsolved for more than a week, despite all attempts both
by day and night. Finally, one moist, warm night, Ned, after stealthily
approaching the sound, satisfied himself of its location in a certain tree
and in the morning was rewarded by the discovery of the 'toad' camped on a
branch near the source whence the sound had issued. Replacing the frog so
that the coarse tubercles of its back corresponded to the bark, Ned
enjoyed a merited reward at the expense of his tent mates who, though
often 'hot,' required some minutes to find the hidden treasure. Then came
the wonder of the stick toes and fingers, the feeding with flies, and the
result was--a new pet for the tent. In the next letters written to the
folks this find was the central theme. How much better this discovery and
the examination of the peculiar colors and structures, also the
conclusions, based upon observed structure, as to the life and habits of
the tree frog than would have been a scientifically learned discussion of
the family Hylidae!

"In a camp of fifty boys the writer remembers three who had special
delight in collecting pebbles, and they made several all-day trips to
distant brooks and beaches in the search for new specimens. Another group
became so fascinated with the study of the food of fish that they begged
the 'privilege' of cleaning the catch of each returning party. Proud was
that lad who incidentally located the heart of a pickerel, and because of
his school knowledge of physiology he could not be convinced that the fish
breathed without lungs till he had spent many hours in the vain endeavor
to locate said organs. Then he knew that his former idea had been
inadequate.

Fishology

"Fortunately, nature is so interrelated in her various phases that an
attempt at exploration in one direction soon opens other fields, until
with the growth of experience there comes a corresponding expansion of
interest. Thus the lads, searching for pebbles, were perforce attracted by
the plant and insect life of the brook, and the one delving into the
mystery of breathing oxygen without lungs developed a new interest in the
physics of fluids, while those who located the tree frog enlarged their
sphe