The American annual of photography . ion is needed that these grooves are trulyperpendicular to the easel when the latter is upright, otherwiseit will be given a sideways twist, a tilt forwards or backwards,or possibly both. Perhaps the fault may be so slight as toescape casual notice, and yet sufficient to affect the definitionin part of the enlargement. It is quite possible to shift the easel when fixing the paper,and it will not do to rely too much on a weighty base, though,obviously, this is desirable. The easel might with advantagebe provided with some kind of clamping screw, to rendershi
The American annual of photography . ion is needed that these grooves are trulyperpendicular to the easel when the latter is upright, otherwiseit will be given a sideways twist, a tilt forwards or backwards,or possibly both. Perhaps the fault may be so slight as toescape casual notice, and yet sufficient to affect the definitionin part of the enlargement. It is quite possible to shift the easel when fixing the paper,and it will not do to rely too much on a weighty base, though,obviously, this is desirable. The easel might with advantagebe provided with some kind of clamping screw, to rendershifting impossible. In conclusion, the probability of vibration must not beoverlooked, for a very little of that will go a long way todestroy sharpness. And vibration, it may usefully be remem-bered, is quite compatible with great apparent rigidity ofconstruction. That is to say, a seemingly light and fragileapparatus may actually be firmer and steadier, owing toscientific design, than one much more solid-looking andneavily-built. 176. MRS. STANDIFORD-MEHLING. 177
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
