some negatives will readily wax
even when the size is not removed. A box iron very hot is best for the
purpose; but the most important thing to attend to is that the paper should
be perfectly dry, and it should therefore be passed between blotting-paper
and well ironed before the wax is applied. Negatives will even attract
moisture from the atmosphere, and therefore this process should at all
times be resorted to immediately before the application of the wax.

Some photographers prefer, instead of using wax, to apply a solution of
Canada balsam in spirits of turpentine. This certainly adds much to the
transparency of the negative; and, in some instances, may be very
desirable. Even in so simple a thing as white wax, there is much {600}
variety; some forming little flocculent appearances on the paper, which is
not the case with other samples. Probably it may be adulterated with
stearine, and other substances producing this difference.

Before concluding these remarks, I would draw attention to the great
convenience of the use of a bag of yellow calico, made so large as to
entirely cover the head and shoulders, and confined round the waist by
means of a stout elastic band. It was first, I believe, used by Dr.
Mansell. In a recent excursion, I have, with the greatest ease, been
enabled to change all my papers without any detriment whatever, and thereby
dispensed with the weight of more than a single paper-holder. The bag is no
inconvenience, and answers perfectly well, at any residence you may chance
upon, to obstruct the light of the window, if not protected with shutters.

I would also beg to mention that a certain portion of the bromide of silver
introduced into the iodized paper seems much to accelerate its power of
receiving the green colour, as it undoubtedly does in the collodion.
Although it does not accelerate its _general_ action, it is decidedly a
great advantage for foliage. Its best proportions I have not been able
accurately to determine; but I believe if the following quantity is added
to the portion of solution of iodide of silver above recommended to be
made, that it will approach very near to that which will prove to be the
most desirable. Dissolve separately thirty grains of bromide of potassium,
and 42 grains of nitrate of silver, in separate half-ounces of distilled
water; mix, stir well, and wash the precipitate; pour upon it, in a glass
measure, distilled water up to one ounce; then, upon the additi