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acid action alcohol angle ANNUAL aperture apparatus appear arrangement bath bromide camera carbonate changing chloride colour combination complete containing covered dark described detail developer diameter dissolved distance double effect equal exposed exposure finds fitted fixed focal focus focussing four frame front given gives glass grains hand inches lantern length lens lenses less light lines London matter means measured method minutes mounted necessary negative object obtained ordinary pass Phot Photo photographs picture piece plate position potassium practically prepared present Price prints produced Professor rapid reduced removed screen screw shown shows shutter side silver similar slide sodium solution stand stars Street surface taken toning washing whole
Page 16 - Tkt unit of weight is the GRAM, which is the weight of one cubic centimeter of pure water weighed in a vacuum at the temperature of 4 deg. Cent, or 39.2 deg. Fahr., which is about its temperature of maximum density.
Page 221 - For this purpose the negative is taken by the photographer on glass, and from this negative copies can be printed in much larger numbers than are generally required by the customer. The customer who sits for the negative thus puts the power of reproducing the object in the hands of the photographer, and in my opinion the photographer who uses the negative to produce other copies...
Page 17 - Meter (as the new unit was named) was therefore defined to be the ten-millionth part of the distance from the equator to the north pole, measured along the sea level, on the meridian passing through Paris.
Page 220 - The question, therefore, is whether a photographer who has been employed by a customer to take his or her portrait is justified in striking off copies of such photograph for his own use, and selling and disposing of them, or publicly exhibiting them by way of advertisement or otherwise, without the authority of such customer, either express or implied. I say 'express or implied...
Page 219 - Behalf the same shall be so made or executed, but the Copyright shall belong to the Vendee or Assignee of such Painting or Drawing, or of such Negative of a Photograph, or to the Person for or on whose Behalf the same shall have been made or executed ; nor shall the Vendee or Assignee thereof be entitled to any such Copyright, unless, at or before the Time of...
Page 219 - The author, being a British subject or resident within the dominions of the crown, of every original painting, drawing, and photograph which shall be or shall have been made either in the British dominions or elsewhere, and which shall not have been sold or disposed of before the commencement of this act, and his assigns, shall have the sole and exclusive right of copying, engraving, reproducing, and multiplying such painting or drawing, and the design thereof...
Page xxii - ... (r). Thus, if the original dimension be four times as large as its reproduction, we say that r equals (=) 4. Multiply F + f by r, and divide the product by the square of a number greater by one than r (r + 1)«.
Page xxii - NOTE. — In case the above may not be clear to some photographers, the following rules may be better understood : — To find the principal focus of a lens (P), focus a near object in the camera and measure the distance between it and the...