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



371 



No. 9524. 



9494. 



9498. 

 9500. 



9504. 

 9506. 



KJELDAHL DIGESTION SHELF, round form, with openings for six flasks and support ad- 

 justable in height for the necks. Diameter, 16 inches; height, 10 inches. Complete with 



6 burners, each with stop-cock $20.00 



KJELDAHL CONNECTING BULB, original design 50 



KJELDAHL CONNECTING BULB, same as No. 9498, but with straight connecting tube for 



bending to any angle. 50 



9502. KJELDAHL CONNECTING BULB, as modified by Hopkins. (See Journal of American Chem- 

 ical Society No. 3, 1896} 60 



KJELDAHL' CONNECTING BULB, cylindrical form so 



KJELDAHL CONNECTING BULB, Jenning's, designed especially for water analysis to per- 

 mit introduction of reagents without removing stopper 80 



Si512. DELIVERY BULB TUBE, for Kjeldahl Apparatus. Prevents sucking back of condensed liquid 



from receiving flask 



For KJELDAHL FLASKS, see Flasks. 



9518. NITROGEN BULB, Fresenius' 



9520. NITROGEN BULB, Volhard's 



9522. NITROGEN BULB, Volhard's, latest form 



9524. NITROGEN BULB, Will-Varrentrap's, with three bulbs 



9526. NITROGEN BULB, Will-Varrentrap's, with four bulbs 50 



NITROMETERS 



9532. NITROMETER. Du Pont, latest modification. Used by manufacturers of explosives for the anal- 

 ysis of nitric acid. etc. Glass parts only as illustrated, with rubber tubing connections. (See 

 Technical Paper 160 of the United States Bureau of Mines) 35.00 



.35 



.80 

 .75 

 .75 

 .40 



