CLAYS OF CUMBERLAND COUNTY. 415 



the pit. The clay from this bank is mixed with clay from Cedar- 

 ville, which is on the road west of Millville. 



The physical properties of the run of bank from both localities 

 180 and 181 are given below : 



Physical properties of clays from Buckshutem. 



hoc. 180 hoc. 181 



Lab. No. 646 Lab. No. 645 



Water required, 27.2% 25.2% 



Air shrinkage, 7% 10% 



Average tensile strength, lbs. per sq. in., 291 289 

 Cone 05 — 



Fire shrinkage, Z-Z% 2% 



Absorption, 12.46% 13-13% 



Color, light red light red 



Condition, nearly steel-hard nearly steel-hard 



Cone 03 — 



Fire shrinkage, 5% 2% 



Absorption, 9.41% 9-05% 



Color, red light red 



Condition, steel-hard steel-hard 



Cone 1 — 



Fire shrinkage, 6% 4% 



Absorption, 5-50% 6.29% 



Color, brick red red 



Cone 3 — 



Fire shrinkage, 6.3% 4% 



Absorption, 448% 4-24% 



Color, dark red red 



Cone 5 — 



Fire shrinkage, 7% 4-3% 



Absorption, 3.51 % 2.86% 



Color, • deep red deep red 



Chemical analysis of clay, A. E. Burchem, Buckshutem. 



Silica ( SiO = ) , 72.37 



Alumina (A1 2 3 ), 1440 



Ferric oxide (Fe 2 3 ), 3.43 



Lime (CaO) , 0.75 



Magnesia (MgO), 0.49 



Alkalies (Na 2 0, K 2 0), 1.60 



Loss on ignition (chiefly water), 6.70 



9974 

 Total fluxes, : . 6.27 



