102 



CLAYS AND CLAY INDUSTRY. 



obtained for $0.01 each from Prof. E. Orton, Jr., of Ohio State 

 University, Columbus, O. The table of fusing points of these 

 cones and their composition is given below. 



No. of 



cone. 



fo.sNa.0? 



• 022 ] o.s PbOf 



.021 



.020 



.019 



0.5 Na 3 

 0.5 PbO 



o.s Na 2 

 0.5 PbO 



0.5 Na 2 1 

 J 0.5 PbOj 



fo.sNa.01 



• 0lS {o.s PbOj 



f 0.5 Na 2 I 

 • 0I 7 J as PbO J 



, fo.5Nao.Ol 

 • 0l6 {0.5 PbOj 



mc fo. 5 Na 2 0) 

 • 0I 5 I 0.5 PbOj 



f 0.5 Na 2 I 



• 0I 4 I0.5 PbO} 



( 0.5 Na 2 I 

 • 0I 3 J0.5 PbO} 



f 0.5 Na.O I 

 • 0I2 I0.5 PbO J 



f 0.5 Na 2 \ 

 • 0I1 {0.5 PbO} 



fo.3 K2O} 

 1 0.7 CaO \ 



fo.3 K 2 0| 

 I 0.7 CaOj 



fo.3 K.O 

 0.7 CaO 



.010 



.09 

 .08 

 .07 

 .06 



.05 

 .04 



.03 





K 2 j 

 7 CaOj 



.3 K 2 0| 

 ■7 CaO 3 



fo.3 K 2 0) 

 I0.7 CaO } 



fo.3 KzO? 

 {0.7 CaOj 



fo.3 K 2 0) 

 I0.7 CaO J 



0.1 A1 2 3 

 0.2 AI2O3 

 0.3 AI2O3 

 0.4 AI2O3 

 0.5 A1 2 3 

 0.55 AI2O3 

 0.6 A1 2 3 

 0.65 AUOs 

 0.7 A1 2 S 

 0.75 AUOs 

 0.8 A1 2 3 



Composition and fusing points of Seger cones. 



Composition. r~ Fusing point.— ^ 



°F. °C. 



1,094 590 



1,148 620 



1,202 650 



1,256 680 



1,310 710 



1,364 740 



1,418 770 



1,472 800 



1,526 830 



1,580 860 



1,634 890 



1,688 920 



1,742 950 



1,778 970 



1,814 990 



1,850 1,010 



1,886 1,030 



1,922 1,050 



1,958 1,070 



1,994 1,090 



0.2 



0-3 

 0.2 

 0-3 

 0.2 

 0-3 

 0.2 

 0-3 

 0.2 

 0-3 

 0.2 

 0-3 

 0.2 

 0.3 

 0.2 

 0-3 



Fe 2 3 

 A1 2 3 



Fe 2 3 

 A1 2 3 



Fe 2 3 

 A1 2 3 



Fe 2 3 

 A1 2 3 



Fe 2 3 

 A1 2 3 



Fe 2 3 

 A1 2 3 



Fe 2 3 

 ALOs 



Fe 2 3 

 AL-Os 



f2.o Si0 2 

 1 1.0 B 2 3 



2.2 Si0 2 

 1.0 B 2 3 



2.4 Si0 3 

 1.0 B 2 3 



2.6 Si0 2 

 1.0 B»0 3 



2.8 Si0 2 

 1.0 B 2 3 



3.0 Si0 2 

 1.0 B 2 3 



[3.1 Si0 2 

 1 1.0 B 2 3 



f 3 -2 Si0 2 

 1 1.0 B 2 3 



f 3-3 Si0 2 

 1 1.0 B 2 3 



f 3-4 Si0 2 

 1 1.0 B 2 3 



3-5 Si0 2 

 1 1.0 B 2 3 



f 3 -6 SiO= 

 X 1.0 B 2 O s 



3-50 Si0 2 

 0.50 B2O3 



3-55 Si0 2 

 0.45 B 2 3 



3.60 Si0 2 

 0.40 B 2 3 



3.65 Si0 2 

 0.35 B 2 3 



3.70 S1O2 

 0.30 B2O3 



3-75 Si0 2 

 0.25 B 2 3 



3.80 Si0 2 

 0.20 B2O3 



3.85 Si0 2 

 0.15 B2O3 



