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THE FERN BULLETIN 



plant and the glass with the face side of the paper 

 towards the glass. Then put in and fasten the back 

 of the printing frame to secure the plant and paper in 

 close contact with each other. Care should be taken 

 to properly arrange the plant in the frame after which 

 place the frame where the sun will shine directly upon 

 the glass. As soon as the ground of the paper darkens 

 to a deep yellowish brown remove the paper and place 

 it face side up under a stream of running water for five 



minutes to wash it. Then pour a little of the fixing 

 solution on the paper wetting all parts thoroughly, 

 then wash the print again and hang it up to dry. The 

 brown of the wet negative turns darker in drying. 

 From three to five minutes exposure in bright sunshine 

 is ample, but this can be varied somewhat according to 

 the nature of the plant. If the plant is thick and 

 opaque a longer exposure is desirable, but if the plant 

 is quite thin and translucent, care must be taken not 

 to over print it. Fig. 1 illustrates a negative printed 



