_Mode of Waxing the Negatives._--Melt the pure white wax over a lamp of moderate heat, just merely to keep it in a liquid state; then fill the same deep tray as above described with boiling water, and with _another_ similar to the upper one before described (_which must be kept for this purpose only_); put a clean piece of blotting-paper in this tray, and lay your negative _face downwards_, and with a soft _flat_ hog's hair-brush, about an inch wide, dip it into the liquid wax, and brush the negative over, when it will be immediately transparent, and it can be done so that there is very little redundant wax, after which it may be put between two or three thicknesses of blotting-paper and ironed, if necessary, which, however, should not be _very_ hot, when it is ready to take positives from. _Positives on Negative Paper._--Take one part of the iodide of silver before described, and add two parts of water; then add as much iodide of potassium as will redissolve it. Brush your paper with the foregoing, let dry, put into water, and proceed, in all respects, as above described for the negatives. _Excite for Positives._--Excite with No. 1.; blot off: lay it in your press, place the negative face downwards: expose to the light from ten seconds to half a minute, or more, according to the light (_not in the sun_), and bring out with No. 3.; and when it is nearly developed add No. 1.; then take it up and pour water upon it, and then place it in hyposulphite of soda (cold) until the iodine is removed; after which put it into allum water, about half a teaspoonful of powdered allum in two quarts of water; this will readily remove the hyposulphite, and also fix the positive more particularly; it will also take away any impurities which there may be in the paper, after which put it into clean cold water, and change two or three times. I have been thus particular in describing the process which I have adopted, more especially for beginners; and with great cleanliness and care in each process, and especially in keeping all the bottles with the chemicals free from dirt of every kind, the foregoing will lead to favourable results. W. J. NEWTON.