The British Journal of Photography, Volume 25

Front Cover
H. Greenwood, 1878 - Photography

What people are saying - Write a review

User Review - Flag as inappropriate


Other editions - View all

Common terms and phrases

Popular passages

Page 133 - I the said do hereby declare the nature of my said invention, and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement...
Page 223 - To look at anything means to place the eye in such a position that the image of the object falls on the small region of perfectly clear vision. This we may call direct vision, applying the term indirect to that exercised with the lateral parts of the retina — indeed with all except the yellow, spot.
Page 9 - THIS region, surely, is not of the earth.* Was it not dropt from heaven ? Not a grove, Citron or pine or cedar, not a grot . Sea-worn and mantled with the gadding vine, But breathes enchantment.
Page 257 - ... line, because the outlines of the components are seldom exactly superimposed. The band will be darkest in its middle whenever the component portraits have the same general type of features, and its breadth, or amount of blur, will measure the tendency of the components to deviate from the common type. This is so for the very same reason that the shot-marks on a target are more thickly disposed near the bull's-eye than away from it, and in a greater degree as the marksmen are more skilful. All...
Page 269 - I have drawn is roughly made, and being chiefly of wood is rather clumsy, but it acts well. and the composite may be viewed by the naked eye, or through a lens of long focus, or through an opera-glass (a telescope is not so good) fitted with a sufficiently long draw-tube to see an object at that short distance with distinctness. Portraits of somewhat different sizes may be combined by placing the larger one further from the eye, and a long face may be fitted to a short one by inclining and foreshortening...
Page 257 - ... one upon another, and then held between the eye and the light I have attempted this with some success. My own idea was to throw faint images of the several portraits, in succession, upon the same sensitized photographic plate. I may add that it is perfectly easy to superimpose optically two portraits by means of a stereoscope, and that a person who is used to handle instruments will find a common double eye-glass fitted with stereoscopic lenses to be almost as effectual and far handier than the...
Page 258 - A composite portrait represents the picture that would rise before the mind's eye of a man who had the gift of pictorial imagination in an exalted degree.
Page 270 - ... of a telescope. I have not yet had an opportunity of superimposing images by placing glass negatives in separate magic lanterns, all converging upon the same screen ; but this or even a simple dioramic apparatus would be very suitable for exhibiting composite effects to an audience, and, if the electric light were used for illumination, the effect on the screen could be photographed at once. It would also be possible to construct a camera with a long focus, and many slightly divergent object...
Page 269 - They have a clear aperture of a square, half an inch in the side, and when held at right angles to the line of sight will separate the ordinary and extraordinary images to the amount of two inches, when the object viewed is held at seventeen inches from the eye. This is quite sufficient for working with cartes-de-visite portraits.
Page 258 - ... extraordinary facility of combining almost any two faces whose proportions are in any way similar. It will, I am sure, surprise most persons to see how well defined these composites are. When we deal with faces of the same type, the points of similarity far out-number those of dissimilarity, and there is a much greater resemblance between faces generally than we who turn our attention to individual differences are apt to appreciate. A traveller on his first arrival among people of a race very...

Bibliographic information