232 



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



No. 5218. 



No. 5222. 



No. 5226. 



No. 5232. 



No. 5238. 



No. 5244. 



5218. EXTRACTION APPARATUS, Soxhlet's, -with Hopkins Inner Cooled Condenser ground to fit 

 into Soxhlet extraction tube, with Knorr flask for mercury seal, preventing any leak of ether 

 vapor. 



No A B C 



Capacity, to top of siphon, ce 60 100 200 



Approximate inside diameter of extraction tube, mm 30 38 50 



Each $7.00 8.00 9.00 



6220. EXTRACTION APPARATUS, same as No. 5218, but with Sy's flask for mercury seal in place of 

 Knorr 's. 



No A B 



Capacity, to top of siphon, cc 60 100 



Each . . '. 7.25 8.50 



5222. EXTRACTION APPARATUS, Teas', for the extraction of tanning materials, as used by the As- 



sociation of Official Agricultural Chemists. Consists of a heavy copper flask of one liter 

 capacity, fitted with ground in copper extractor lined with tin, and a tin lined copper Soxhlet 

 condenser. A side tube is provided for removal of percolate and for flooding the contents of 



the extraction tube. Height, 18 inches; diameter of flask, 7 inches 23.50 



CONDENSER only of No. 5222, see No. 3234. 



5223. EXTRACTION TUBE only of No. 5222. Can be used with any 750 cc Erlenmeyer flask. . . 16.50 



5226. EXTRACTION APPARATUS, Underwriters' Laboratories Improved Form, with glass siphon cup. 



(See "Standards for Rubber Covered Wires and Cables," 1915) '. . . 3.30 



5227. CONDENSER only of No. 5226 2.25 



5228. EXTRACTION FLASK only of No. 5226 35 



5229. SIPHON CUP only of No. 5226 70 



5232. EXTRACTION APPARATUS, Wiley's, consisting of nickel-plated copper condenser, tin lined, 



special form, with suspended porcelain Gooch crucible, arranged to fit into straight glass tube 

 with ground flange, rendering the use of stoppers unnecessary. Both residue and extracted 

 matter may be easily weighed 6.50 



5233. CONDENSER only of No. 5232 5.35 



5235. GLASS TUBE only of No. 5232, of Pyrex glass 75 



5184. GOOCH CRUCIBLE only of No. 5232, with holes for suspension 40 



5238. EXTRACTION APPARATUS, Wiley's, Modified by Richardson, with glass siphon cup. Especi- 



ally adapted for extraction of tankage, cotton-seed meal, meat, soap, etc. (See Journal of 

 Industrial and Engineering Chemistry, Vol. IV, No. 3, for March 1912, page 221) 6.80 



5239. GLASS SIPHON CUP only of No. 5238 70 



5240. GLASS TUBE only of No. 5238 .75 



CONDENSER only of No. 5238, see No. 5233. 



5241. PERFORATED GLASS CUP, to be used with No. 5238, in place of siphon cup for percolation 



purposes 60 



EXTRACTION FLASKS, see Flasks, Extraction. 



5244. EXTRACTION THIMBLES, Alundum, for the extraction of soaps, fats, food, rubber, etc., by 

 both organic and inorganic solvents. Very rapid, practically indestructible and readily cleaned 

 by ignition. Medium porosity carried in stock. Fine and coarse porosities can be supplied on 

 short notice. Thickness of wall, approximately 1 mm. 



flat bottom round bottom 



No A B C D E 



Length, mm 55 70 90 100 127 



Diameter, mm 35 25 19 34 45 



Each .50 .45 .50 .60 1.00 



