LABORATORY SUPPLIES AND CHEMICALS 



291 



3944 



3946 



3949 (a) 



3943 TEST TUBES, Bacteriological, so-called Board of Health test tubes, of best 



American glass, of rather thick wall, without flange. 



Size, inches 5xy 2 5xH 6xJ^ 6xi 6x^ 7x% 



Per dozen $0.30 .35 .35 .40 .45 .50 



Per gross 3.00 3.50 3.50 3.75 4.60 5.50 



3944 TEST TUBE, with side neck. 



Length, inches 5 6 8 10 



Dozen $0.60 .75 1.00 1.50 



3946 TEST TUBES, on foot, plain. 



Height, inches 4 5 6 8 10 



Dozen $0.75 .85 1.00 1.50 2.00 



3948 TEST TUBES, on foot, graduated. 



Capacity, c.c 5 10 15 25 



Grad. c.c Vz Y* H V* 



Each $0.75 .80 .85 1.50 



3949 TEST TUBES, Fused Silica, heavy wall with flared tops. 



Size, inside, inches 4x^ 5x^ 6x^4 7x^ 



Each $0.85 1.20 1.75 2.25 



3949 (a) TEST TUBES, Titre Tubes, for determining the solidification point of fats, 



etc. 



Size, inches 3x# 3x1 4x^ 4x1 



Per dozen $0.30 .40 .40 .50 



Per gross 3.00 4.00 4.00 5.00 



THERMOMETERS 



i 



3950 



THERMOMETER, chemical, scale engraved on the stem, with white back, very 

 exact; each in pasteboard case 



3950 THERMOMETER, Grad. up to C in 1 100 150 200 250 360 



Each $1.20 1.30 1.40 1.50 2.00 



3952 THERMOMETER, Grad. up to F in 1 212 400 600 



Each $1.20 1.40 1.75 



3954 THERMOMETER, Chemical, milk glass scale, enclosed in glass tube; each in 

 pasteboard case. 



Grad up to C in 1 100 150 200 250 360 



Each $2.50 3.00 3.50 3.75 4.00 



3956 THERMOMETER, Grad. up to F in 1 212 400 600 



Each *. .$2.50 3.00 4.00 



3958 THERMOMETER, Chemical, with paper scale, enclosed in glass tube; each in 

 pasteboard case. 



Grad. up to C in 1 100 150 200 250 360 



Each $2.00 2.50 2.75 2.75 3.00 



3960 THERMOMETER, Grad. up to F in 1 212 400 600 



Each $2.00 2.50 3.00 



