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



No. 7160. 



No. 7168. 



No. 7164. 



No. 7182. 



No. 7190. 



GLASS INK, see Diamond Ink No. 3816. 

 GLASS PLATES, see Plates, Glass. 



7160. GLASS TUBING CUTTER for cutting tubing from inside. The glass tube is held in fiber rests 



so that the cutting wheel describes a perfect circle. Length 12 inches; cuts glass of from % to 

 1 inch inside diameter up to 8 inches length $1.50 



7161. EXTRA CUTTING WHEEL for No. 7160 15 



7164. GLASS TUBING CUTTER, to .clamp on the table, with hardened steel cutting wheel and handle 



for producing even pressure. Will take tubing from y 16 to 1V 2 inches. For extra cutting wheel 



see No. 7155 6.50 



7168. GLASS TUBING CUTTER, a highly tempered steel knife with wooden handle. Both sides can 



be used 1-25 



7180. GLASS ROD, best quality lead free glass, in lengths of about five feet. From 3 to 13 mm in 

 diameter. Diameters are subject to usual factory variations. Eod in smaller quantities than 

 5 pounds if desired in full lengths should be so specified, otherwise lengths co'nvenient for 

 packing may be sent. An additional charge will be made for selecting rod gauged accurately. 



Diameter, mm 3 4 to 13 



Per pound 60 .50 



Please specify diameter in ordering. 

 7182. GLASS RODS, Stirring, with one end rounded, the other pointed. Size, in. 5x% 8x% 6 lOx'/i 



Per dozen 35 .50 .60 



7184. GLASS ROD, soft glass, for sealing in platinum per pound .60 



7190. GLASS TUBING, best soft glass, lead free, for glass blowing, bending, etc., in lengths of about 

 five feet. Diameter and thickness of wall are subject to usual factory variations. 

 An additional charge will be made for selecting tubing gauged accurately inside or outside. 

 Tubing in smaller quantities than 5 pounds, if desired in full lengths, should be so specified, 

 otherwise lengths convenient for packing may be sent. 



Orders for assorted tubing above 25 mm must be for 5 pounds or more; orders for assorted tub- 

 ing from 13 to 25 mm must be for 2 pounds or more; from 3 to 12 mm for 1 Ib. or more. 

 Diam. outside, mm. 3 5 6 8 10 12 15 19 22 25 32 35 38 47 50 



Per pound 80 .50 .50 .50 .50 .50 .50 .50 .50 .50 .60 .60 .80 .80 .80 



7192. GLASS TUBES, Annealed Ends. Glass tubes of large diameter are not satisfactory unless ends 

 are annealed to prevent longitudinal cracking. We list below a few sizes but can supply any 



size desired. No ABODE FGH JKLM 



Diameter outside, cm. 2.5 2.5 2.5 2.5 2.5 2.5 3 3 4 4 4 4 



Length, em 30 60 75 100 120 150 100 120 45 60 90 100 



.60 .70 .70 .75 .80 1.10 1.20 .90 1.10 1.70 1.75 

 PQBSTUVWXYZ 

 4 4.5 555555555 

 120 100 20 30 38 45 60 75 90 120 150 

 1.85 2.50 .70 1.10 1.20 1.25 1.30 1.60 1.70 2.60 2.80 



Each 40 



No N 



Diameter outside, em. 4 



Length, cm 110 



Each 1.80 



