...the purpose of a picture is not veracity to fact so much as truthfulness to idea; that is to say, it is not a question of what eye sees nor even w… - Alfred Horsley Hinton

The utmost care and forethought, and no little manipulative skill, are necessary to control the defining power of the lens or detail printing power of a sharply focused negative.

Inferior as a mechanical printing method for ordinary photographic purposes, the gum process may for a time at least be regarded as standing apart for pictorial purposes, because the large amount of personal control which must be exercised before it can be said to show distinct advantages over other methods implies that the controlling hand must be guided by an artist that is, a man of such large instinctive artistic taste that one can hardly conceive that he would be able to produce a better result by painting, and without the use of photography at all, were he to devote the same skill and endeavour to the employment of brush or pencil, instead of photographic appliances.

The different degree of light interference between blue and red also affords a power which we may be glad to avail ourselves, in some cases using the red where a very marked degree of lightening is desired, or blue where only a trifling difference is needed.