rendering distant details on a large scale. The results are greatly
superior to enlargements of a small plate. It is, however, useless in
a wind, unless the camera is specially supported, and is otherwise
rather tricky to use. The traveller is strongly advised to master its
management at home. It should be adjusted by the maker to the camera
for which it is intended.

Unless a photographer's dark room can be had the developing of the
bulk is best left until the return home, but tests should be made to
see that the exposures are correct. A piece of ruby fabric or ruby
paper tied over an electric light will give a safe light after dark,
and 'Scalol' or some such one-solution developer which requires
merely the addition of water, will give all that is needed for
developing. For fixing use 4 oz. hypo to a pint of water.

In warm climates, use cold water. If it is not cool enough, the
gelatine of the negatives may give trouble. In that case, get colder
water, and use an alum bath. If water is precious, plates can be
sufficiently washed by moving them forward in succession, through
half-dozen soup plates filled with water.

If habitual use is not made of tabloid developers, &c., it is
advisable to have some in reserve, for use in the case of broken
bottles and spilt solutions.

Useful notes and maxims.

An over-exposed plate gives no dark shadows in the print.

An under-exposed plate gives no high lights. When in doubt, choose