148 



CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



No. 2890. No. 2890 (open). 



No. 2902. 



No. 2906. 



2890. CLAMPS, Tubing, Screw Compressor, new form, of brass nickel-plated; a combination of Hof- 

 mann's and the old form; can be placed upon rubber tubing without disconnecting apparatus. 



No A B 



For tubing up to, inches %e % 



Each $0.20 .25 



2892. CLAMP, same as No. 2890, but extra heavy, for pressure tubing up to % inch inside diameter. 



35 



2894. CLAMP, Tubing, Bunsen's Screw Compressor, of brass, nickel-plated, for heavy rubber tubing. 



Size, % by 1% inches 40 



2896. CLAMPS, Tubing, Hofmann's improved form, nickel-plated -with open jaw. 



No A B 



For tubing up to, inches ] /2 % 



Each 22 .28 



2898. CLAMPS, Universal, with swivel jaws adapting themselves to irregular shapes; with check nut 

 enabling object to be held at any angle. For use with Clamp Holder No. 2914. 



No A B 



For tubes up to, inches 3 



Total length, inches 8 10 



Each 65 .85 



2900. CLAMPS, Universal, same as No. 2808, with iaws rubber covered. 



No A B 



Each 70 .90 



2902. CLAMP, Watch Glass, of brass, nickel-plated, for watch glasses up to 2% inches in diameter .12 

 2904. CLAMP, Watch Glass, of brass spring wire, for watch glasses up to 3 inches in diameter. . . .10 

 2906. CLAMP, with brass hook for supporting thermometers and other apparatus; with screw for at- 

 taching to support rods 75 



2914. CLAMP HOLDER, of iron with brass screws, for fastening clamps to support rods up to % inch 



in diameter .35 



2916. CLAMP HOLDER, same as No. 2914, with swivel, for attaching clamps at any angle 50 



2918. CLAMP HOLDER, Stoddard's, an ingenious device for rigidly holding Stoddard Wire Test Tuba 



Holder No. 2880 in any position. Provides for vertical and horizontal adjustment to any angle, 

 uid will adapt itself to a great many uses in the laboratory. Clamp holder with right angle 

 clamp, but without Test Tube Holde'r No. 2880 44 



2919. CLAMP HOLDER only of No. 2918 16 



2920. RIGHT ANGLE CLAMP only of No. 2918. Has one % 2 -inch hole and one %-ineh hole. .. .28 

 2922. BASE AND ROD for use with No. 2918 as shown in illustration. Base is heavy, and stable even 



with excessive load; rod is 15x% 2 inches -60 



