CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



349 



8768. 

 8776. 



8780. 



8784. 

 8788. 



8792. 



8794. 



8798. 



8799. 

 8802. 



8804. 

 8810. 



No. 8788. 



No. 8802. 



No. 8810. 



SLIDES, Microscope, concave center, 75x25 mm (3x1 inch) per dozen $0.90 



SLIDE, Drop Culture or Hanging Drop Slide, 75x25 mm (3x1 inch), with spherical cavity 22 

 mm in diameter by 3 mm deep, ground in polished plate glass 30 



SLIDE, Current, Holman's. A plate glass slip, with two oval cells connected by a very shal- 

 low channel. In use, the cells are partly filled with blood and covered by a thin cover glass. 

 By bringing the finger near one of the cavities,, the air is caused to expand and drive the 

 blood through the channel where it may be observed under very favorable conditions. Com- 

 plete with cover 2.00 



SLIDE, Life Box, consisting of two glass plates, one on a metal slip, the other adjusted to it 

 by a sliding sleeve. For examining organisms in fluid. Diameter of cell, 25 mm; maximum 

 depth, 8 mm; slip 32x80 mm 2.50 



SLIDE, Siphon, Holman's. Consists of a thick plate glass slip with two shallow oval cavities 

 and a deep groove to hold a small fish or similar object and retain it without undue pressure 

 in a fixed position. Small metallic tubes communicate with the extremity of the deep 

 groove. By means of these tubes water may be siphoned through the slide thus keeping the 

 water supply continuously renewed and enabling the object to be kept under observation for 

 long periods of time. Complete with cover 6.00 



SLIDE MOUNTING CELLS, Glass. Kings with finely ground edges, for cementing on micro- 

 scope slides to make cells. No A B C D E 



Diameter, mm 15 18 18 22 24 



Height, mm 3 5 10 9 10 



Each 15 .15 .15 .15 .15 



SLIDE MOUNTING CELLS, Hard Rubber, similar to No. 8792, furnished in depths from 0.5 to 



3mm. Diameter, mm 13 16 19 



Each 06 .06 .07 .07 



In ordering kindly specify depth as well as diameter. 



SLIDE BOXES, of white wood, with covers fitting inside, so arranged that when removed the 

 ends of the slides are exposed so that they can be easily removed. Grooved to hold 25 objects, 

 numbered and indexed per dozen .90 



SLIDE BOXES, same as No. 8798, but grooved to hold 12 slides numbered and indexed, 

 per dozen 95 



SLIDE BOXES, of white wood with covers closely fitting outside, grooved to hold 25 objects, 

 numbered and indexed per dozen 1.10 



SLIDE BOXES, grooved to hold 100 slides, cloth covered, with hinged cover and catch, each .50 



SLIDE CABINET, Minot's Metal, very compact, occupying much less space than a wooden 

 cabinet and affording much better protection against fire. It is strongly made of metal 

 throughout, neatly finished on the outside in maroon-colored japan with bronze stripes. The 

 inside finish is in black japan. It contains 30 japanned metal trays, each holding 24 glass 

 slides, 75x25 mm. The trays are provided with convenient knobs and with card-holders. 

 The cabinet is furnished with a good brass lock and measures 36.3 cm in height, 32.5 cm 

 in depth and 17.5 cm in width, outside. Complete with 30 trays 25.00 



