CENTBAL SCIENTIFIC CO., CHICAGO, TT. 8. A. 



279 



No. 6628. 



No. 6632. 



No. 6636. 



No. 6650. 



C628. GAS ANALYSIS APPARATUS, Orsat-Muencke, for the analysis of CO 2 , CO, and O 2 , especially 

 adapted for furnace and flue gases. Consists of three absorption pipettes, manifold tube 

 with four stop-cocks, measuring burette with water jacket, and aspirator bottle. Complete 

 in portable polished wooden case $35.00 



6629. EXTRA MANIFOLD TUBE for No. 6628 with four stop-cocks 9.50 



(5632. GAS ANALYSIS APPARATUS, Great-Fischer, designed for portability. Similar to No. 6628, 

 but about half the size, with drying tube inside case, attached to manifold. Complete with 

 three pipettes, in portable polished wooden case 35.00 



6633. EXTRA MANIFOLD TUBE for No. 6632, with four stop-cocks 9.50 



6636. GAS ANALYSIS APPARATUS, Orsat-Lnnge, similar to No. 6628, but with four pipettes and 



bent palladium tube with lamp, for separate estimation of hydrogen. Complete with drying 

 tube, in portable polished wooden case 42.50 



6637. EXTRA MANIFOLD TUBE for No. 6636, with five stop-cocks 12.00 



6638. EXTRA BENT PALLADIUM TUBE for No. 6636 4.00 



Extra Parts for Orsat Gas Apparatus Nos. 6628, 6632 and 6636. 



6640. ABSORPTION PIPETTE, plain 2.00 



6641. ABSORPTION PIPETTE, filled with glass tubes 2.50 



6642. ABSORPTION PIPETTE, filled with glass tubes and copper spirals 3.50 



6643. MEASURING BURETTE only without water jacket 5.50 



6644. WATER JACKET only for measuring burette 1.25 



1614B. ASPIRATOR BOTTLE, 8 ounces 70 



6645. SOFT RUBBER BAG for attaching to pipettes (for illustration, see page 428) 60 



6832. RUBBER ASPIRATOR BULB with two valves and rubber connections (see page 428) ... .60 



6650. GAS ANALYSIS APPARATUS, Petterson-Palmqulst, for determining small quantities of CO 2 

 in air. This is the standard laboratory apparatus recommended by the American Public 

 Health Association for investigations of ventilation in schools, factories, public buildings, 

 etc. Complete in polished wooden case. (See American Public Health Journal, Vol. "VTI, No. 

 1, for January 1917) 55.00 



