glass, or low-power telescope. Prismatic compass with card partly
black, to see at night. Large and small celluloid protractors for
plotting angles on plans. Plotting-scale, tenths of inches and
millimetres. Maps of the district, the best available. Aneroid
barometer, if collecting flints; small size; can be tested by
observing in a tall lift, or by putting in a tumbler and pressing the
hand air-tight over the mouth. The zero error, or absolute values,
are not wanted for levelling, only delicacy in small variations.
Magnifiers, a few pocket size; will also serve for presents.
Indelible pencils, pens, and ink in strong corked pocket bottle.
Reservoir pens dry up too much in some climates. China ink for
permanent marking. Strips of adhesive paper, about a inch and a
inches wide, to put round objects for labelling. Strong steel pliers,
wire-cutting. A few pocket-knives will serve for presents. It is best
to carry money in a little bag or screw of paper, loose in the jacket
pocket, it in a risky district. It can then be dropped on any alarm
and picked up afterwards.

Photographic.[1]
In the selection of a camera much will depend upon the nature of the
work to be undertaken, the conditions of travel, and the climate to
which the camera will be exposed. For accurate work a stand camera is
always to be preferred to one of the hand variety, and care should be
taken to choose an instrument that is strongly made and of simple
construction. The essentials of a good stand camera are that it shall
be rigid, possess a rising and falling front, a swing back, and
bellows which will be capable of extension to fully double the focal
length of the lens to be used with it.

[1]Prof. Petrie is not responsible for this section, which is due to