For this reason it is best to prepare your own quick, after some formula which is known to be good.

Those quick-stuffs which contain chloride of iodine are noted for their depth of tone while they probably operate with less uniformity than those which are destitute of it.

For operating under ordinary circumstances, especially with an inferior light, probably no accelerator is more quick and sure than Wolcott's.
It also produces a very fine, white pleasing picture, though lacking that depth of impression so much to be desired.

The dry quick operates with surety, and its use is simple and easy, producing an impression much like Wolcott's.

For those having a good and permanent light, however, we would recommend a chemical giving more body to the impression.
There is a class of accelerators called sensitives, claiming to work in from three to ten seconds, which, however, will be found very little, if any, more sensitive than this.