520 



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



No. 14366. No. 14370. No. 14359. 



14344. WATER BATH, Wiley Patented, designed to generate steam quickly with small gas consump- 



tion. Of heavy copper with replaceable water cup of spun copper 3% inches in diameter, with 

 12 openings S 1 /^ inches and 2 openings 5% inches in diameter, with concentric copper rings and 

 constant water level regulator, mounted on substantial angle iron support. Dimensions of 

 top, 25x141^ inches; depth on outside edge, 2 inches; depth in center, 4 inches; capacity to 

 water inlet, 250 cc. Can be operated easily by one ordinary Bunsen ' urner $50.00 



14345. EXTRA WATER CUPS for No. 14344 each 1.15 



WATER EXAMINATION APPARATUS 



COLOR TUBES, see Nos. 3014 to 3032. 

 3010. HEHNER'S CYLINDERS for the estimation of iron in water, consisting of two graduated glass 



tubes of same size and graduation, with stop-cocks per pair 6.00 



HYDROTIMETERS for hardness of water, see No. 7800. 

 NESSLER JARS, soe Color Comparison Tubes. 



SEDGWICK-RAFTER APPARATUS, for Microscopical Examination of Water. See ' ' The Microscopy 

 of Drinking Water," by Geo. C. Whipple. 



14352. SEDGWICK-RAFTER FUNNEL, graduated, with attachment and rubber stopper 3.25 



14353. SEDGWICK-RAFTER FUNNEL, plain, with attachment and rubber stopper 1.50 



14354. BERKSHIRE SAND per pound .15 



14355. BOLTING CLOTH DISKS per dozen .25 



14356. SUPPORT for funnel 1-75 



14357. COUNTING CELL 3 50 



14358. COVER SLIP 30 



14359. EYEPIECE MICROMETER 3.50 



14360. PIPETTES, a set of two, one each 1 ce and 5 cc per set .35 



14361. GRADUATED FLASK, 25 cc ' 50 



MICROSCOPE, see general heading Microscopes. 



WATER HEATERS, see Heaters. 



14366. WATER SAMPLE CASE, consisting of a well made wooden case with hinges, hasp and handle; 

 with separate compartments for one 5 pint and one 4 ounce glass stoppered bottle. Excellent for 

 obtaining samples of drinking water for analysis by health departments. Complete with bottles 

 and container for small bottle 5.00 



14370 WATER TESTING APPARATUS, for the determination of ammonia in water, as used by the De- 

 partment of Health of New York City, consisting of a metal condenser with block tin condenser 

 tube and support, eight Nessler cylinders graduated at 50 and 100 cc in revolving support, 

 flask, burner and support for same. .". 25.00 



