VI II 



SCIENCE— ADVEBTWEMENTS 



LABORATORY RUBBER 



TUBING 



MADE ESPECIALLY FOR LABORATORY WORK AND DISTINCTLY 

 SUPERIOR TO STOCK RUBBER TRADE TUBING 



No. 46199. A. C. Pure Gum Tubing, Thick Wall 



46199. Rubber Tubing, A, C. Pure Gum, thick wall. Made from semi-transparent, pure gxmi sheet without coloring 

 material. It is acid cured, i.e., without "bloom," and is the best tubing obtainable for purposes in w^hich 

 an acid cured, bloomless stock is required. 



Inside diameter, mm 3 4 5 6 8 



Thickness of waU, mm U 1^ U li 2 



Per ft 08 .08 .12 .15 .25 



20 per cent, discount in cartons of 10 ft. 



No. 46203. F. S. Pure Gum Tubing, Thick Wall 



Rubber Tubing, F. S. Pure Gum, thick wall. A seamless, hand-wrapped cloth impression tubing made of 

 the finest grade of Para rubber and sulphur. This tubing is steam-cured and on this account is delivered 

 with a sUght "bloom" and is of specific gravity 0.93, i.e., Floating Stock rubber. The hand-wrapping 

 process makes the stock firm and eliminates porosity, while the curing on smooth mandrels makes the bore 

 of the tubing absolutely smooth. F. S. Pure Gum Tubing will last much longer in laboratory work than 

 any acid-cmed tubing and is recommeuded for all laboratory work excepting the few instances where the 

 elight sulphur content might influence determinations. 



Bore, inches 1/8 5/32 3/16 1/4 5/16 3/8 1/2 5/8 3/4 



Walh inches 1/16 1/16 5/64 5/64 3/32 3/32 7/64 1/8 1/8 



Pe Tft 08 .08 .12 .15 .25 .30 .35 .50 .60 



20 per cent, discount in cartons of 10 ft. 25 per cent, discount in cartons of 25 ft. 



Prices subject to change zvithout notice. 



ARTHUR H. THOMAS COMPANY 



WHOLESALE, RETAIL AND EXPORT MERCHANTS 



LABORATORY APPARATUS AND REAGENTS 



WEST WASHINGTON SQUARE 



PHILADELPHIA. U. S. A. 



