88 THE A B C OF PHOTO - MICROGRAPHY 



the tube limiting the projection of image em- 

 braced in the field of the objective. Fortu- 

 nately, however, this class of work is well 

 within the scope of a camera alone, any of 

 which, provided with a rectilinear lens of 

 short focus and sufficient bellows extension, 

 may be utilized in its prosecution, if also fur- 

 nished with a ground glass focusing screen. 

 The only difficulty amounting to anything will 

 be found in the very short bellows, so usual 

 with American cameras, which cannot be ex- 

 tended sufficiently to reproduce an object at 

 full natural size, to say nothing of enlarging 

 it. If one possesses the E., R. & C. camera 

 (Fig. 3), this trouble will not worry him. The 

 cone bellows front may be removed, and the 

 object, if transparent, fitted in a carrier, so 

 that all light entering the camera must pass 

 through it. The lens is to be attached to a 

 board in middle section, through the door 

 shown in illustration, and the camera turned 

 toward the source of light, which may be re- 

 flected from the sky or a cardboard placed at 

 proper angle by day. If night work is neces- 

 sary, the flat side of a coal oil burner, a Wels- 

 bach incandescent mantle or acetylene flame 

 with rays made fairly parallel by means of a 

 bull's-eye condenser, are all good and satisfac- 



