square of yellow calico, which he can loosely peg down to the ground when no other shade is near, to contain spare prepared papers, he can at any future time obtain a sufficient number of views, which afterwards he can develop at his leisure. It requires no liquids to be carried about with you, nor is that nice manipulation required which attends the collodion process. The wax-paper process has been extolled by many, and very successful results have been obtained: the paper has the undoubted advantage of keeping after being excited much longer than any other; but, from my own experience, just so much the weaker it is made, and so as to safely rely upon its long remaining useful, so it is proportionally slower in its action. And I have rarely seen from {22} wax negatives positives so satisfactory in depth of tone, as from those which have been waxed after being taken on ordinary paper. It is all very well for gentlemen to advocate a sort of photographic tour, upon which you are to go on taking views day after day, and when you return home at leisure to develop your past proceedings: I never yet knew one so lukewarm in this pursuit as not to desire to know, at his _earliest possible_ opportunity, the result of his labours; indeed, were not this the case, I fear disappointment would more often result than at present, for I scarcely think any one can exactly decide upon the power of the light of any given day, without having made some little trial to guide him. I have myself, especially with collodion, found the action very rapid upon some _apparently_ dull day; whilst, from an unexplained cause, a comparatively brighter day has been less active in its photographic results. As in the previous process, I would strongly advise Turner's paper to be used, and not the thin French papers generally adopted, because I find all the high lights so much better preserved in the English paper. It may be purchased ready waxed nearly as cheap as it may be done by one's self; but as many operators like to possess that which is entirely their own production, the following mode will be found a ready way of waxing:--Procure a piece of thick smooth slate, a trifle larger than the paper to be used; waste pieces of this description are always occurring at the slate works, and are of a trifling value. This should be made very hot by laying it close before a fire; then, covered with one layer of thick blotting-paper, it will form a most admirable surface upon which to use the iron. Taking a piece of wax in the left hand, an iron well heated being pressed against it, it may rapidly be made to flow over the whole surface with much evenness, the surplus wax being afterwards removed by ironing between blotting-paper. When good, it should be colourless, free from gloss, and having the beautiful semi-transparent appearance of the Chinese rice-paper. To iodize the paper completely, immerse it in the following solution: