CENTRAL SCIENTIFIC CO., CHICAGO, TJ. 8. A. 



247 



No. 5644. Nos. 5646-50. No. 5654. 



No. 5658. 



No. 5664. 



No. 5666. 



Capacity, 500 ce. 



250 

 1.10 



500 

 1.50 



5636. FLASKS, Distilling, Ladenburg's, with three bulbs in neck. 

 5640. FLASKS, Distilling, Lunge's Tar, with trap. 



Capacitv, cc. . ............................ 125 



Each . . '. ...................................................... 75 



Note: Other types of distilling flasks will be made to specifications. 



5644. FLASK, Elutriating, Benningsen, with neck graduated to 40 ec in 1 cc divisions. Capacity, about 

 4oO cc ............................................................................. 1-50 



5646. FLASKS, Extraction, Resistance Grade, flat bottom, with wide mouth and vial neck. 



Capacity, cc ............................................ 60 125 175 250 



Outside diameter of neck, mm ........................... 31 40 43 



To take rubber stopper, No ............................. 8 9 



Number in original case ................................ 192 120 144 96 



Each ................................................... 11 .13 .17 21 



Per dozen in original case ............................... 1.19 1.40 1.84 2.27 



5650. FLASKS, Extraction, Pyrex Glass flat bottom, with wide mouth and vial neck. 



Capacity, cc ................................... 50 100 150 250 500 



To take rubber stopper, No .................... 6 6 8 10 



Number in original case ....................... 168 120 108 120 60 



Each .......................................... 13 .15 .17 .19 .29 



Per dozen in original case ...................... 1.40 1.62 1.84 2.05 3.13 



5654. FLASKS, Extraction, Knorr's Original Form, for mercury seal; capacity, 100 ce ......... 50 



5656. FLASKS, Extraction. Knorr's, as modified by Walter and Goodrich, with two holes in neck for 

 return flow of ether. Capacity, 100 cc ............................................. 50 



5658. FLASKS. Extraction, Sy's Form, with trough for mercury seal and with holes in neck for return 

 of ether. Capacitv. 100 cc .......................................................... 80 



For other EXTRACTION FLASKS, see Nos. 5209 and 5228. 

 5664. FLASKS, Filtering, Erlenmeyer form, of he ivy glass, with side neck, 



Capacity, cc ............................. " ............ 250 500 1000 2000 



Each..'. .............................................. 50 .65 1.00 1.95 



5666. FLASKS, Filtering, same as No. 5664, with glass stop-cock on side neck. 



Capacity, ce .................................................. 250 500 1000 



Each . . '. ..................................................... 2.50 2.80 3.00 



5668. FLASKS, Filtering, same as No. 5664, with side tube, and funnel ground in neck. 



Capacity, cc .................................................. 250 500 1000 



Each..'. ..................................................... 1.65 2.00 2.75 



5672. FLASK, Gray's Carbon Residue, Opaque Fused Silica, for determining the carbon residue of 

 lubricating oils. Capacity, 50 cc. May be used repeatedly, as the residue can be burned out 

 with oxygen. (See Report of Committee D-2 of the American Societv for Testing Materials for 

 1914 ... ........................................................................ 4.06 



FLASKS, Gas Generating, see Gas Generators. 



