506 
MR. C. H. LEES ON THE THERMAL CONDUCTIVITIES 
Table of Results. 
Material and direction of stream 
Thermal conductivity between 25 and 35° C. 
Refractive 
lines. 
C.G.S. units. 
Index. 
Copper. 
•7 to - 8 Lorenz, F. Weber, &c. 
Brass. 
Brass bar used. 
■27 
•25 to -3 Lorenz, Neumann, &c. 
Bismuth. 
•017 Lorenz 
Mercury. 
•018 Angstrom 
Crown glass. 
•00243 
•0016 H. Meter. 
1-53 
Elint glass. 
•00201 
•0014 „ . 
1-64 
Glass. 
f-0021 Peclet 
\ ’0005 G. Forbes 
Rock salt. 
•0138 
•016 Tuschmidt. 
1-55 
Quartz along axis. 
•0299 
f 026 Tuschmidt. 
[ ‘001 G. Forbes 
1-55 
,, perpendicular to axis . . 
•0158 
J -016 Tuschmidt. 
\'004 G. Forbes 
1-56 
Iceland spar along axis. 
•0100 
•016 Tuschmidt. 
1-66 
,, perpendicular to axis . 
•0084 
•0086 „ . 
1-49 
Mica perpendicular to cleavage . 
•0018 
1-57 
G0075 Peclet 
White marble. 
•0071 
< -0073 Yamagawa 
|_ '0011 G. Forbes 
Slate . 
•0047 
•0008 
W ater. 
•0015 Winkelmann 
Glycerine. 
•0007 
Olive oil. 
■0004 F. Weber 
Shellac. 
•00060 
Paraffin. 
•00061 
■00014 G. Forbes 
Pure Para rubber. 
Rubber. 
•00038 
•00046 Peclet 
Vulcanised rubber. 
Sulphur. 
•00045 
•00009 G. Forbes 
Ebonite. 
•00040 
■00008 
Gutta pei’cha.- . 
•00046 
Paper. 
•00031 
•00045 G. Forbes 
Asbestos paper. 
•00057 
Mahogany across fibre. 
•00047 
Walnut across fibre. 
•00036 
Cork. 
•00013 
Silk. 
•00022 
Cotton. 
•00055 
Flannel. 
•00023 
