CENTRAL SCIENTIFIC CO., CHICAGO, IT. 8. A. 



427 



J 



No. 11320. 



No. 11472. 



11314. 

 11316. 



11320. 



: -- 1 . 



11450. 

 1 !452. 



REDUCTOR, Blair's, for the determination of phosphorus in "steel, by the zinc filtration 

 method. With glass stop-cock. (See Blair 's Analysis of Iron. 8th Edition, page 89) .. $2.00 



REDUCTOR. Blair's, same as Xo. 11314, but complete with support, elamp, two flasks, glass 

 stop-cock, and connecting tubes 6.00 



REDUCTION TUBE, of Pyrex hard glass, with bulb on end. Length, 15 em $0.25 



REDUCTION TUBES, of Pyrex hard glass, with bulbs in center. 



Xo '. A 



Number of bulbs 1 



Length, mm 300 



Each .30 



For EEFEACTOMETERS and ACCESSORIES, write for special information. 



REGULATORS. Gas and Electrical, see Thenno-regnlatoTS. 



REGULATORS. Gas Pressure, see Xos. 6530, 6556 and 7070. 



RESERVOIRS. Leveling, see Bulbs, Leveling, Xo. 1902. 



RESPIRATOR, for protection from dust, sawdust, smoke, fumes and gases. -Made of soft rub- 

 ber and provided with a perfect filter device; easily kept clean and bends perfectly to fit the 



B 



2 



350 

 .42 



C 

 3 



400 



.50 



face 



1.75 



1146-2. 



11468. 

 11472. 

 11478. 



RESPIRATOR or Face Mask, of felted material so formed as to make an air-tight joint around 

 the face, thereby protecting the eyes, nose and lungs from dust, smoke, fumes and gases. 

 The filters, upon which the efficacy of the mask depends, do not need renewing and are guar- 

 anteed for three years. For the eyes there is a large celluloid or mica covered opening, per- 

 mitting perfect vision to all points 10.00 



RETORT ADAPTERS, see Adapters. 

 RETORT RECEIVERS, see Receivers. 



RETORTS. Copper, for making oxygen; flask shape, with iron elamp and brass delivery tube 

 fitted with ground joint. 



Capacity, ec 250 500 _ 



Each 2.90 3.40 4.15 5.60 



RETORTS. Copper for distillation, see Distilling Apparatus. 

 RETORTS. Glass, plain. 



Capacity, cc 125 250 500 1000 



Each .70 .80 .90 1.00 



RETORTS. Glass, tabulated, with ground glass stopper. 



Capacity, ec 125 250 500 ' 



Each LOO LIO L25 1.80 



RETORTS, Iron, for distilling mercury, ete.; with removable cover, fastened by screw elamp, 

 with delivery tube ground in the cover. 



Capaeity.ee 250 500 ; 4 



Each 3.80 4.10 4-50 6.00 8.00 



