74 Paper Process in Photography. [no. 1, new series, 



Should air bubbles be present, they will be indicated by that por- 

 tion of the paper remaining uncolored. Put in as many papers 

 as the tray will hold without crowding. When, all are in, remove 

 in succession the bottom paper to the top, turning it as you do so, 

 this will enable you to see if the whole have been properly im- 

 mersed. The dish should be shaken occasionally to prevent the 

 papers adhering to each other, which they have a tendency to do, 

 and which is shown by light patches where the free access of the 

 solution has been prevented. The papers may be immersed from 

 2 to 3 hours, and then hung up to dry. 



The best mode of suspending iodized papers is to hang up each 

 sheet with two of the American spring clips, made of Beech and 

 sold in London at 1 shilling a dozen, they are to be strung upon a 

 piece of bobbin or thin cord, and stretched across a room that is 

 free from dust, which would soil the papers,— and from strong 

 draughts of air, which would tear the paper out of the clip. 



An additional precaution which I found necessary to prevent stain- 

 ing is to prepare some strips of new blotting paper, as wide as the 

 clips and about j of an inch long, fold these in two, and having 

 taken up a paper by two corners, let an assistant drop one of these 

 papers on each corner close to your fingers, he then opens a clip 

 and you put in one corner of the paper, where the blotting paper 

 is, you will find it most convenient to open the second clip your- 

 self. A small strip of blotting paper should be placed at each of 

 the lower corners to facilitate draining, and prevent an excess of 

 the iodizing materials from lodging there, which will be the case if 

 this is not attended to. 



"When the papers are dry, trim off the half inch in excess of the 

 length of the slide from whichever end appears most to need it, 

 and put them by in an envolope made of course drawing paper, 

 which should be kept in a portfolio, or a tin case made for the pur- 

 pose. 



Thus far the operations may be conducted in any convenient 

 room, but those which I am about to describe must be carried on 

 in a, room fitted up for the purpose, and into which no ray of white 

 (or common daylight) must be allowed to enter whilst either excit- 



