224 L. CASELLA'S CATALOGUE 



2667. MARSH'S APPARATUS, for detection of arsenic ; tube with 2 bulbs, etc. 060 



2668 . ARSENIC APPARATUS, consisting of hydrogen-generator, fitted with tube for chlo- 



ride of calcium and ignition tube of hard glass (fig. 2668), p. 223 046 



APPARATUS FOR DISTILLATION. 



2669. Still, working model, suitable for the student or lecture table (fig. 2669), p. 223, 



pint size, 1 10s. ; 1 pint, 1 18s. ; 1 quart . . 2 10 



2670. STILLS, of stout copper, tinned inside, with tub and pewter worm, complete for 



use on common fire, 1 gallon size, 1 18s. ; 2 gallon ditto . 2 15 



2672. STILLS, of stout tin, 1 gallon size, 1 ; 2 gallon ditto . . 180 



2673. STILLS, portable, of stout copper, tinned inside, best make, galvanized iron tub, 



pewter worm, strong iron furnace and frame, 2 gallon size, 5 ; 3 gallon, 

 5 10s. ; 4 gallon, 6 6s. ; 5 gallon . . . . 800 



2674. Retorts, of thin hard German glass (fig. 2674), p. 222, per dozen : 



Size : 2-oz. 4-02. 6-oz. 8-oz. 12-02. i6-oz. 24-02. 36-oz. 50-02. 



s. d. s. d. s. d. s. d. s. d. s d. s. d. s. d. s. d. 



Plain 30 30 40 50 70 80 10 11 15 



7 8 8 6 9 12 14 17 20 23 



2675. RECEIVERS, plain, tubulated and stoppered, about same capacity and price as 



retorts. 



2676. EETORT STANDS, small, on iron foot, with 2 rings 019 and 026 



2677. EETORT STANDS, 13 inches high, with 3 rings . ,.,-. . y . 034 



2678. DITTO, DITTO, more massive, 16 inches, 4s. ; 20 inches, 5s. ; and 24 inches high, 



with larger rings . . , , . JY 10 6 



2679. Cray Lussac Holder, or vice for fixing retorts, iron or brass (fig. 2679), p. 228, 



3 6 to 5 



2680. TUBE HOLDER to affix to the retort stand, brass . . ' . 026 



2682. ALEMBICS of hard German glass, 2 oz. size, with movable heads 020 



2683. of glass, large size (fig. 2683), p. 225, 5s., 6s. 6d., 7s. 6d., and 10 



2684. TUBE ALEMBICS, for fractionizing small quantities of liquids . 016 



2685. ADAPTERS, straight or bent glass ; width of neck, 1 inch., 8d. ; 2 inch., Is. ; 3 



inch. . . .' . . ' . v . 016 



2686. LIEBIG'S CONDENSERS ; glass tube in japanned tin, 30 inch., 7s. 6d. ; 40 inch. 



090 



2687. SUPPORT for the same, with universal joint . . Y 6 6 



2688. mahogany polished . . . - . . 10 



2689. lieblg's Condenser, entirely of glass, fitted complete, the condensing tube 36 



inch, long . . . . . . . 5 6 



2690. TUBES for Liebig's condensers, Is. 6d., 2s., and . - , . 026 



GRADUATED GLASS APPARATUS-ALKALI METERS. 



2692. Bink's Alfcalimeter, for Centigrade testing (fig. 2692), p. 225, graduated into 

 100 divisions, equal to 100 decimillems, 700 or 1000 grains of water, or 50 

 cubic centimetres, 5s. ; or upon glass stand (fig. 2692*), p. 225 056 



