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



347 



8708. 



8709. 

 8710. 

 8711. 

 8714. 



8715. 

 8716. 

 S717. 

 8718. 



S719. 

 8720. 



$7 2-2. 



8730. 

 8731. 

 8734 



No. 8708. 



No. 8714. 



No. 8722. 



LAMP, Microscope, Spencer Quadruple, for illuminating several microscopes at the same time. 

 It measures 6x6x9 inches, and is entirely constructed of metal, finished with crystal black 

 which is exceedingly durable. It is fitted with a 100-watt 110- volt Mazda gas-filled bulb, ad- 

 justable in height. A single lamp will supply illumination with entire satisfaction for four 

 microscopes at a distance of three feet. The top of the lamp house reaches a maximum 

 temperature of about 140F., serving as a convenient place for drying specimen slides or 

 keeping paraffine fluid. Complete with standard pear-shaped Mazda bulb, five feet of attach- 

 ment cord, snap switch and plug, four ground and'f our blue glasses $10.00 



LAMP, Microscope, same as No. 8708, but fitted with four disks of Daylite glass 13.00 



EXTRA BULB for Xos. 8708-9, 100-watt, 110-volt 1.25 



RHEOSTAT for use with Xos. 8708-9, on 220-volt circuit 6.00 



LAMP. Microscope. Spencer High Power Mazda, designed to meet the demand for a very strong 

 beam of light without the objections incident to an arc. Equipped with a Mazda gas-filled 

 concentrated filament bulb, an independent silvered glass reflector of the proper curve, and 

 a pair of 4^-inch condensing lenses which throw a converging beam of light out through the 

 cone. May be tilted at practically any angle. An excellent instrument for use with the dark 

 field illuminator, and for photomicrography. This apparatus with an attachable section and 

 projection objective, forms a very compact and efficient stereopticon. Complete as described 



with 250-watt, 110-volt Mazda bulb 20.00 



LAMP, Microscope, same as No. 8714, but with 400-watt 110-volt Mazda bulb 23.00 



DAYLITE GLASS AND ADAPTER for Xos. 8714 and 8715 2.00 



RHEOSTAT for Xo. 8714, on 220-volt circuit 5.00 



RHEOSTAT for Xo. 8715, on 220-volt circuit 6.00 



EXTRA BULB for Xo. 8714, 250-watt, 110-volt 4.00 



EXTRA BULB for Xo. 8715, 400-watt, 110-volt 6.00 



DISTRIBUTING BOX for Microscope Lamps, Spencer Quadruple, designed to meet the demand 

 for using several microscope lamps on a single laboratory table from a single incandescent 

 electric extension. Made of metal, fitted with five porcelain sockets. The current is supplied 

 by attaching extension cord and plug to the top socket. It may quickly and easily be re- 

 moved when the laboratory table is desired for other purposes 6.50 



MICROMETER, Eyepiece, a glass disk with finely ruled scale to be laid upon the diaphragm 



of an ordinary Huyghenian eyepiece, with a 5 mm scale divided into 50 parts (to 0.1 mm) 1.50 



MICROMETER! Eyepiece, same as Xo. 8730, but with scale divided into 100 parts (to 0.05 



mm) 1-50 



MICROMETER, Stage, for standardizing eyepiece micrometers, consisting of a glass object slide 

 with finelv ruled scale. 1 mm divided into 100 parts 3.00 



