LABORATORY SUPPLIES AND CHEMICALS 



283 



3853 STOPWATCH, fifth second, 30 minute 

 register, start, stop and fly back 

 from crown, in nickel case $7.50 



6788 STOPWATCH, Antimagnetic, abso- 

 lutely guaranteed, a reliable 

 watch for laboratory purpose, in 

 nickel case $14.00 



3855 



3857 



3857 (a) 



3857 SULPHUR APPARATUS, Meyer's, modified by Brady with 10 bulbs each 



1% inches diameter .- $1.75 



3857(a) SULPHUR APPARATUS, Meyer's, for determination of sulphur in iron 



and steel by bromine; with stop-cock and 9 bulbs 3.75 



3857(b) SULPHUR APPARATUS, same as above, without stop-cock 1.75 



3857(c) 



3857(c) SULPHUR RACK, as used by the Illinois Steel Co. Consists of a sup- 

 port for glass ware combined with a battery of special high tempera- 

 ture burners supplied with individual stop-cocks and hot plates, all 

 parts adjustable. Its rugged construction and open design tend to con- 

 venience of operation and facilitate the cleaning up of acid and other 

 dirt which always accumulates about this class of apparatus. Will not 

 warp. May be supplied with rack to hold absorption tubes instead of 

 bulbs , $30.00 



