TABLE 1 



Material 



Ceramic 

 BTL F3 Mg. Silicate type 



"Dielectene" 



Glass, Corning 



Gl,lead 



G8, lime, annealed 



G12, lead 



199-1 



702EJ, Pyrex 



702P 



704EO 



705BA 



707DG 



Glyptal 



Lucite 



Mycalex 



Red 



White 



Phenolics 



Cast specimen 



Bakelite sheet ^" 



Polyethylene 



Worst 



Most common 



Best 



Polystyrene 



VVorst 



Most common 



Best 



Poly vinylcarbazole 



Rubber 



Hard, brown 



Hard, black 



Soft, black 



Resin 



Styralloy 



Xo. 10 



Desig. Unknown 



Xo. 22 



Stvramic 



E1689 



Tenite H 



Mnylite V 



Wax 



Paraffin 



Boler 



Superla 



5.83 



4.30 

 6.38 

 6.08 

 8.70 

 6.35 

 4.70 

 4.42 

 3.80 

 4.69 



3.38 



2.58 



5.91 

 5.74 



2.26 



2.45 



2.87 



3.15 



2.32 



2.49 

 2.49 

 2.40 



2.78 



2.17 

 2.17 

 2.26 



10 cms. 



3.39 



4.8 



3.36 



2.56 



4.63 



3.57 



2.77 

 2.69 



2.50 



2.55 

 2.95 

 2.61 



2.26 



P.F. 



22.5 cms 



.00023 



.0049 



.0102 



.0035 



.0019 



.0067 



.0053 



.0033 



.0011? 



.0037 



.030 



.0090 



.0030 

 .0033 



.00229 

 .00060 

 .00031 



.00090 

 .00070 

 .00028 



.0040 



.0058 

 .0018 



.0036 

 .0019 

 .0047 



.0076 



.00019 

 .00019 

 .00019 



10 cms. 



.0038 



.0036 



.036 



.0087 



.139 

 .080 



.0041 

 .0059 



.00105 



.00087 



.031 



.0068 



.00015 



125 



