458 



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



No. 12465. 



No. 2818. 



No. 12472. 



I 



J 



I 



n 



No. 12464. 



CB 



No. 12458 



No. 12462. 



12455. 



12458. 



12459. 

 12462. 



VI -1 til. 



12465. 



2818. 



12468. 



12472. 



P3355 



CELLULOID STRIPS for No. 12454 Tubes. 



Length, inches 12 24 36 48 



Each $0.18 .38 .54 .96 



For CLEANING BRUSH, see No. 1876. 



For SUPPORT, see No. 12462. 



TUBES, Capillarity, Sectional, for determining capillary rise of water in soils. These sections 

 are made of heavy brass tubing and are 8 inches long by 1% inches in diameter. Each sec- 

 tion is threaded at both ends to receive brass couplings so that the tubes may be built up to 

 any desired length. The tubes may readily be cleaned, and the breaking of the soil column 

 which causes so much annoyance in long brass and glass tubes is obviated, because the sec- 

 tion joints, which are tight enough to prevent evaporation losses from the soil, are loose 

 enough to permit equalization of air pressure inside and outside of tube. (For Bottom Tube, 

 see No. 12459 below.) Per section (with one coupling) 1.25 



BOTTOM TUBE, for No. 12458 with perforated bottom. For use as lowest tube of set. . 1.50 



CAPILLARITY TUBE SUPPORT for supporting 2-inch tubes 32 inches long or longer in a 

 vertical position. Will hold six tubes which may be readily removed or put in place. The 

 base is constructed in form of a tray and holds a water-tight zinc tank. A rod and ring at 

 the side of the tray is designed to hold an inverted flask so that the height of the water in 

 the tray may be kept constant. Complete as illustrated, but without flask or tubes.. 9.00 



TUBES, Capillarity, Glass. 



Diameter, inches 2 2 2 1 



Length, inches 8 15 24 60 



Each 70 1.20 1.30 .80 



PERFORATED BOTTOM for 2-inch Glass Soil Tubes. May be used with tubes from Ii/i 6 

 inches to 2^g inches in diameter. Clamps firmly to the bottom of the tube, but may readily be 

 removed for changing from one tube to another 30 



For CLEANING BRUSH, see No. 1876. 



CAPILLARITY TUBES, Glass, student's lamp chimney form per dozen 1.80 



SUPPORT, of wood, x-or holding four No. 2818 Capillarity Tubes 1.40 



SUPPORT, for four No. 2818 Capillarity Tubes, more substantial than No. 12468. Base of wood 

 with metal uprights and adjustable shelf for supporting tubes; finely finished 2.50 



TUMBLERS, for use with No. 2818 Tubes; ^-pint size per dozen .60 



