CENTEAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



249 



No. 5736. 



No. 5740. 



No. 5762. 



No. 5764. 



No. 5766. 



5712. FLASKS, Transparent Quartz, regular shape, flat bottom, with long, narrow neck. 



Approx. capacity, cc.. 15 25 50 100 150 200 250 500 



Each " $3.30 4.50 6.00 10.80 14.40 19.20 22.80 30.00 



5714. FLASKS, Transparent Quartz, flat bottom, with short, wide neck. 



Approx. capacity, cc.. 15 25 50 100 150 200 250 500 



Each 3.30 4.50 6.00 10.80 14.40 19.20 22.80 30.00 



5716. FLASKS, Transparent Quartz, round bottom, with long, narrow neck. 



Approx. capacity, cc.. 15 25 50 100 150 200 250 500 



Each " 3.30 4.50 6.00 10.80 14.40 19.20 22.80 30.00 



5718. FLASKS, Transparent Quartz, round bottom, with short, wide neck. 



Approx. capacity, cc.. 15 25 50 100 150 200 250 500 



Each....; " 3.30 4.50 6.00 10.80 14.40 19.20 22.80 30.00 



5720. FLASKS, Transparent Quartz, Erlenmeyer form. 



Capacity, cc 50 100 200 500 



Each..". 6.00 10.80 19.20 30.00 



5724. FLASKS, Opaque Fused Silica, flat bottom, with vial mouth. These are sufficiently clear to 

 make visible the level of liquid inside, and are specially adapted for direct heating by electric 

 resistance wires. Very useful for boiling at high temperatures, destructive distillation, etc. 



Capacity cc. . 50 100 200 250 500 



Each..'. 2.75 4.00 5.00 6.25 7.50 



5728. FLASKS, Soil Analysis, Pyrex glass, Erlenmeyer form, with condenser tube 100 cm long ground 

 in neck. 



Capacity, cc 250 500 



Each . . '. 1-40 1.65 



5732. FLASK, Sulphur, Pyrex glass, for use in detecting sulphured grain. Consists of an Erlenmeyer 

 flask with ground iu stopper and delivery tube. Capacity, 500 cc. (See Circular 111 of the 



Bureau of Plant Industry, United States Department of Agriculture) 1.95 



5736. FLASKS, Sulphur, flat bottom, with side neck bent at right angle, as used in determining sulphur 



in iron and steel. Capacity. 500 cc 75 



5740. Flasks, Johnson's Sulphur, Resistance Grade, of heavy glass with heavy vial neck. Used widely 

 for determining sulphur in iron and steel analysis. Capacity, 270 ce; neck of size to take No. 7 



rubber stopper; number in original case, 96 Each .22 



FLASKS, Vacuum, see Vacuum Tubes. Per dozen in original case 2.38 



5762. FLASKS, Volumetric, accurately graduated to contain, without stopper. 



Capacity, ec 10 25 50 100 200 250 300 500 1000 2000 



Each..'. 45 .45 .50 .50 .55 .60 .80 .85 1.00 2.00 



5764. FLASKS, Volumetric, same as Xo. 5762, but with glass stopper ground in. 



Capacity, cc 10 25 50 100 200 250 300 500 1000 2000 



Each..'. 75 .75 .80 .85 .90 .95 1.15 1.20 1.40 2.50 



5766. FLASKS, Volumetric, with glass stopper and two marks on neck, graduated both to contain and 



deliver. Capacity, cc , 100 250 500 1000 



Each 90 1.10 1.40 1.70 



