Classified and illustrated price-list and catalogue of photographic lenses, cameras, apparatus, and materials : made, imported and sold wholesale and retail by James WQueen & Co . ^T*HE construction of this holder is clearly shown in the As it carries only one plate, it is not often used for work at adistance from the dark room. It is unsurpassed, howevei, inphoto-micrography and in the enlarging and reducing camera, andespecially in using the gelatino-bromide printing paper in making anenlarged picture from a small negative. No. For Plates, Price. P-64O. 3, E^x 4^ inches, Singl
Classified and illustrated price-list and catalogue of photographic lenses, cameras, apparatus, and materials : made, imported and sold wholesale and retail by James WQueen & Co . ^T*HE construction of this holder is clearly shown in the As it carries only one plate, it is not often used for work at adistance from the dark room. It is unsurpassed, howevei, inphoto-micrography and in the enlarging and reducing camera, andespecially in using the gelatino-bromide printing paper in making anenlarged picture from a small negative. No. For Plates, Price. P-64O. 3, E^x 4^ inches, Single Dry-Plate Holder, • $1 50 P-64I. 4 x 5 a tt ft 1 75 P-642. 4, 5XA tt tt it 1 85 P-643. 4 tt tt tt 1 90 P-644. 5 x 7 ft tt tt 2 10 P-645. 5 x 8 tt t-<554. 25 X3O u « « . 25 00 74 James W. Queen & Co., Philadelphia. ROLL fr*HE roll holder consists of a light-proof box with a dark slide,X arranged to hold a spool, upon which is wound a belt oinegative film long enough to suffice for 24 to 48 full-plate ex-posures. It is similar in purpose to the dry-plate holders, and canbe fitted to any camera in the same manner as they. A recorder working by sound (in some of the holders by sight also)tells when a full length of paper has been uncoiled and drawn tightlyover the fiat surface, which serves to keep the neg. film in the sameplane as the face of the ground glass. After exposure, the keyWhich moves the reel is turned again until the sounder indicates thata fresh length is in place, when it, too, may be exposed. The filmwhich has not been used and that which has already been exposedare both kept in darkness during the exposure of the plate. When all the band, or as much of it as desired, has been exposed,all or that part is taken from the reel and cut into separate lengths atthe marks left by the recorder.
Size: 1863px × 1341px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectopticalinstruments
