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



231 





No. 5197. 



No. 5204. 



No. 5206. 



No. 5212. No. 5213. No. 5214. No. 5216. 



5194. EXTRACTION APPARATUS, Knorr's, modified by Walter & Goodrich. Complete with Con- 

 denser No. 5189, extraction tube, perforated nickel lower disk and flask for mercury seal with 

 holes for ether return, but without spring or upper perforated disk. (See Circular No. 69, 



Bureau of Chemistry, United States DepartJient of Agriculture) $4.35 



Extra Parts for No. 5194. 



5197. EXTRACTION TUBE, improved form, without projections or sealed in disk. Without wire spring 



or disk .45 



5198. SPRING for No. 5197 to press sample against lower disk .25 



5199. DISK, upper, for No. 5197, of nickel .30 



5200. DISK, upper, for No. 5197, of platinum at market price 



5201. DISK, lower, for No. 5197, of nickel 40 



5202. DISK, lower, for No. 5197, of platinum at market price 



5656. EXTRACTION FLASK, improved form, same as No. 5654, but with two holes in neck for return 



flow of ether 50 



5204. EXTRACTION APPARATUS, Eeed's, of polished copper, for bark and wood extracts. Widely 

 used in tanning laboratories. Complete with Soxhlet spherical condenser 33.00 



5206. EXTRACTION APPARATUS for Rubber Insulating Material, as recommended by the Joint Rub- 



ber Insulation Committee. Consists of a glass flask of special size with condenser of the Cottle 

 or Underwriters' form and glass siphon cup, made according to the exact specifications of the 

 Committee. (See Journal of Industrial and Engineering Chemistry, Volume IX, No. 3, for 

 March 1917, page 310) 3.30 



5207. CONDENSER only of No. 5206 2.25 



5209. FLASK only of No. 5206, of Pyrex Glass 35 



5210. SIPHON CUP only of No. 5206 70 



5212. EXTRACTION APPARATUS, Soxhlet's, complete with No. 5646 Flask, No. 5213 Extraction 



Tube and No. 5215 Allihn's Condenser, fitted with fine grained cork stoppers for connection. 



No A B 



Capacity to top of siphon, cc 60 100 200 



Height of siphon tube, mm 100 110 120 



Approximate inside diameter, mm. 30 38 50 



Suitable for extraction thimbles, mm 80x22 80x33 123x43 



Length of condenser jacket, inches 6 10 



Size of flask, cc 125 175 250 



Each 3.25 3.60 4.50 



5213. EXTRACTION TUBES only of No. 5212 1.50 2.00 2.80 



5214. EXTRACTION TUBES only for No. 5212, especially designed for analysis of Cottonseed Oil, to 



take Extraction Thimbles No. 5248, 80x22 mm. 



No A B 



Length of siphon tube, mm 25 45 



Each 1-50 



5215. CONDENSERS only of No. 5212 Each 1.10 1.30 1.80 



CONDENSERS, Soxhlet's, for use with No. 5212, see No. 3234. 



5646. EXTRACTION FLASKS only of No. 5212. 



Capacity, ce 60 125 175 



Approximate diameter of neck, mm 31 35 40 



To take rubber stopper, No. . 7789 



Each 11 .13 .17 .21 



For other EXTRACTION FLASKS, see Flasks, Extraction. 



5216. EXTRACTION APPARATUS, Soxhlet's, similar to No. 5212, but with all joints ground. Com- 



plete with three flasks ground to fit extraction tube. 



No ABC 



Capacitv to top of siphon, ce 60 100 200 



Each .. 8.50 9.60 10.50 



