230 



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



No. 5168. No. 5170. No. 5172. No. 5174. 



No. 5180. 



No. 5183. No. 5188. No. 5191. 



EMERGENCY KIT, see First Aid Cabinet. 

 5160. EMERY CLOTH, in sheets 9x11 inches. 



No 000 00 1 



Per sheet $0.10 .10 .10 .15 



Per quire 2.00 2.00 2.00 2.25 



5162. EMERY PAPER, in sheets 9x11 inches. 



No 000 00 



Per sheet .' .06 .06 .06 



Per quire 1.20 1.20 1.20 



5168. EUDIOMETERS, Bunsen's, with platinum electrodes. 



Capacity, cc 50 



Graduated in, cc i/, 



Each 2.00 



5170. EUDIOMETERS, Bunsen's, with platinum electrodes; graduated in mm. 



Length of graduation, mm 300 



Each 2.20 



EUDIOMETER, Hoffman's, see Lecture Apparatus. 

 5172. EUDIOMETERS, Mitscherlich's, with glass stop-cock and platinum electrodes. 



Capacity, cc 50 



Graduated in, cc 1/5 



Each 3.70 



5174. EUDIOMETERS, Ure'S, U form, with platinum electrodes, 50 cc; graduated in iths 



.15 

 2.50 



1 



.06 

 1.20 



100 

 2.80 



500 

 2.80 



100 

 1/5 

 4.20 



3.00 



EXTRACTION APPARATUS 



5180. EXTRACTION APPARATUS, Bailey-Walker, consisting of a metal condenser, small glass flask 



of special shape, and a small glass siphon cup. This is one of the most compact forms of extrac- 

 tion apparatus and can be used for any kind of work. The flask is light and can be accurately 

 weighed and easily cleaned. Made according to the design of Bailey and Walker, of the Bureau 

 of Chemistry, United States Department of Agriculture. (See Journal of Industrial & Engin- 

 eering Chemistry, Vol. VI, No. 6, for June 1914, page 497) 5.00 



5181. CONDENSER only of No. 5180 - 3.50 



5182. FLASK only of No. 5180 60 



5183. SIPHON CUP only of No. 5180 65 



5184. GOOCH CRUCIBLE, Porcelain, 25 cc, with holes for suspension; for use with No. 5180, for per- 



colation method i 40 



5185. GLASS CONDENSER for No. 5180, of compact form, for use when desirable to avoid contact of 



metal with the solvent 1.00 



5188. EXTRACTION APPARATUS, Knorr's, original form, consisting of a No. 5654 Flask, 100 cc, for 



mercury seal, No. 5189 Condenser and No. 5191 Extraction Tube 8.50 



5189. CONDENSER only of No. 5188 with adapter sealed on 3.00 



5654. EXTRACTION FLASK only of No. 5188, Knorr's original form, for mercury seal. Capacity, 



100 cc ' 50 



5191. EXTRACTION TUBE only of No. 5188, Knorr's original form, with perforated platinum disk 

 sealed in and three glass projections to allow escape of ether vapor from the flask 5.00 



