how quickly an experienced hand can clear the ground in a
forest with one of these instruments. All of these tools should have
handles of second-growth American hickory of first quality; and
several extra handles should be taken along. The list of tools should
be completed with a small outfit of pliers, tweezers, files, etc.--the
character, of course, depending upon the mechanical ability of the
traveller and the scientific instruments he has with him that might
need repairs.

SURVEY INSTRUMENTS--The choice of instruments will depend largely
upon the character of the work intended. If a compass survey will
suffice, there is nothing better than the cavalry sketching board used
in the United States Army for reconnaissance. With a careful hand it
approaches the high degree of perfection attained by the plane-table
method. It is particularly adapted for river survey and, after one
gets accustomed to its use, it is very simple. If the prismatic
compass is preferred, nothing smaller than two and one half inches in
diameter should be used. In the smaller sizes the magnet is not
powerful enough to move the dial quickly or accurately.

Several good pocket compasses must be provided. They should all have
good-sized needles with the north end well marked and degrees engraved
in metal. If the floating dial is preferred it should be of aluminum
and nothing smaller than two and one half inches, for the same reason
as mentioned above regarding the prismatic compass.

Expense should not be spared if it is necessary to secure good
compasses. Avoid paper dials and leather cases which absorb moisture.
The compass case should allow taking apart for cleaning and drying.

The regular chronometer movement, because of its delicacy, is out of
the question for rough land or water travel. We had with us a small-
sized half-chronometer movement recently brought out by the Waltham
Company as a yacht chronometer. It gave a surprisingly even rate under
the most adverse conditions. I was sorry to lose it in the rapids of
the Papagaio when our canoes went down.

The watches should be waterproof with strong cases, and several should
be taken. It would be well to have a dozen cheap but good watches and
the same number of compasses for use around camp and for gifts or
trade along the line of travel. Money is of no value after one leaves
the settlements. I was surprised to find that many of the rubber
hunters were not provided with compasses, and I li