glass rod, not tubing, bent to the above shape in a Bunsen flame ; this is placed in hot water till quite hot, wiped dry, and then the emulsion is spread with it, the plate being on the plate of glass on the levelling stand. Mr. W. K. Burton, in his well-known and excellent little handbook " Modern Photography," describes a different method of coating, which I have used with success, and as I have also one of the drying boxes he describes, I give the extract from the book entire.
" There are several methods of coating plates in common use The best for those who have the skill is the method used for coating with collodion, and which we describe; but we imagine most of those who have not worked the wet process will find the plan which has been used for some time by the writer, and which is also described, the most convenient. For the ordinary method the apparatus necessary is as follows: -
"A small teapot. A large flat dish of the nature of a porcelain flat bath to catch spillings. A pneumatic holder. This is an india-rubber ball with sucker attached, the whole forming an apparatus whereby it is possible to pick up a plate.
" In coating by the ordinary method, it is advisable to have two ruby lamps, one placed at the back of the operating table, the other in front of the operator, and above the level of his head. He can thus see the emulsion on the plate, both by re-flected and by transmitted light. The flat dish is placed between the lower light and the operator; the teapot full of emulsion, melted, and at a temperature of 1200 F., or thereabout, may be placed on this dish, and the plates, polished side downwards, are placed to the right of the flat dish.
u The pneumatic holder is taken in the left hand, which is stretched across the flat dish, to take hold of a plate. The plate is held level, and a pool of emulsion is poured on to it, and guided over it exactly as was described for varnishing a plate. The only difference is that more than half the plate is at first covered with emulsion, and that, instead of the plate being drained, it is only slightly tipped up, so as to let a little of the emulsion return to the teapot. After this is done, the plate is gently rocked for a few seconds, till we see by looking through it that the coating has spread evenly. To tell whether the plate has had enough emulsion left on it, we look through it, after it has set, at one of the ruby lights. If we can see the