372 



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



r 



No. 



9546. 



I 



No. 9550. 



I 



V 



No. 9552. 



No. 9556. 



No. 9560. 



Parts and Accessories for No. 9532 



9533. COMPENSATING TUBE only, with open tube for sealing when standardized ,.... $3.00 



9534. GENERATING BULB only, holding about 300 cc, with two stop-cocks and reservoir 10.00 



9535. MEASURING TUBE only, graduated from 10 to 14 per cent, in 0.01 divisions 8.00 



9536. MERCURY LEVELING BULBS only each 1.25 



9537. THREE-WAY TUBE only, for connecting compensating tube to measuring tubes and leveling 



bulb 75 



9538. UNIVERSAL TUBE only, graduated from to 100 per cent, in % divisions 12.00 



9539. IRON SUPPORT STAND for No. 9532, with six upright rods, rings for the leveling bulbs, clamps 



for the tubes, and clamps for the upright and cross rods. Made to order only 22.00 



9546. NITROMETERS, Lunge's, with three-way stop-cock and plain leveling tube. 



Graduated to, cc 50 in \{ 100 in % 



Each 5.00 5.30 



9550. NITROMETERS, Lunge's, same as No. 9546, but provided with special .three-way stop-cock. 

 With plain leveling tube. 



Graduated to, cc 50 in }{ 100 in % 



Each 5.25 6.00 



9552. NITROMETER, Lunge's, for larger volumes. Extensively used in the determination of nitro- 

 gen in gunpowder and explosives. Graduated from 100 cc to 140 cc in } cc divisions, with 



graduated leveling tube 8.00 



9556. NITROMETER, ScMff's, graduated to 100 ee in % cc divisions; on support with reservoir, 

 clamp and connections. . 7.00 



9560. NITROGEN APPARATUS, Van Slyke's, for the Gasometric Determination of the Aliphatic 



Aniino Groups. With this apparatus, a complete determination of the nitrogen in amino acids 

 can be made in less than 10 minutes with an accuracy equivalent to that of the Kjeldahl 

 method. It has the further advantage of permitting successive determinations to be made 

 without disconnecting the parts. Any amount up to 10 cc may be analyzed with an accuracy 

 of } milligram of nitrogen. This apparatus can be used for the study of protein digestion, 

 both in vitro and in vivo; the determination of the nature of the amino acids yielded by 

 hydrolysis of small amounts of protein; determination of free amino groups in fixing the 

 constitution of various organic substances, and the determination of amino acid nitrogen in 

 urine, blood and tissues. Complete with glass parts and supports, pulley, shaking device and 

 connections, but without electric motor. (See Journal of Biological Chemistry, Vol. XII, page 

 275, for 1911 and Vol. XVI, page 121 for 1913) 42.00 



9561. GLASS PARTS only of No. 9560 22.00 



9562. DEAMINIZING VESSEL only of No. 9560 14.00 



9563. GAS BURETTE only of No. 9560, with three-way stop-cock, leveling bulb and connecting tub- 



ing 6.00 



9564. GAS PIPETTE only of No. 9560, for shaking 2.00 



9566. NITROGEN APPARATUS, Van Slyke's, similar to No. 9560, but smaller in size, so-called 



Micro size. Complete with supports, pulley, shaking wheel, and connections, but without 

 motor 44.00 



9567. GLASS PARTS only of No. 9566 24.00 



9568. DEAMINIZING VESSEL only of No. 9566 16.00 



9569. GAS BURETTE only of No. 9566 6.00 



9570. GAS PIPETTE only of No. 9566 2.00 



