LABORATORY SUPPLIES AND CHEMICALS 



217 



NITROGEN DETERMINING APPARATUS 



3522 3523(a) 



3522 CONDENSER (Kjeldahl's), copper, tin-lined, with six coils of pure block 



tin, size of apparatus 24 inches long, & l / 2 inches wide, 14 inches deep; 



height, including legs, 24 inches. 



Price $25.00 



3523 CONDENSER (Kjeldahl's), same as above, but with ten coils; size of ap- 



paratus, 40 inches long, 6^ inches wide, 14 inches deep; height, in- 

 cluding legs, 24 inches. 

 Price 42.50 



3523 (a) DIGESTING SHELF (Kjeldahl's), round form, 1G inches diameter, 10 



inches high, with six burners, each with stop-cock 21.50 



3524 



3525(a) 



3524 



DIGESTING SHELF (Kjeldahl's), oblong form, made of sheet iron, 

 with rod to support the flasks. The shelf is supported on adjustable 

 legs. Six burners in a row, each with stop-cock. .Size of apparatus, 

 24 inches long, 5^2 inches wide, 9J/ inches high. 

 Price . 18.00 



3525 DIGESTING SHELF (Kjeldahl's), oblong form, with ten burners. Size of 

 apparatus, 40 inches long, $y 2 inches wide, 9^ inches high. 

 Price 24.00 



3525(a) DIGESTING SHELVES (Kjeldahl's), electrically heated, oblong form, 

 5J4 inches wide and 9 inches high, made of sheet iron, with rod to 

 support the flasks. Each Heater, which is Z l / 2 inches diameter, is a 

 unit, either one or all may be used at one time, as desired. 



Digesting Shelf six heaters, 24 inches long 70.00 



Digesting Shelf ten heaters, 40 inches long. . . 100.00 



