PEIRCE AND WILLSON. — THERMAL CONDUCTIVITIES. 33 



3A' 



2K 



-K 



2K 



4 A' 



2A' 



2 A' 



T 2 7' -iT \T 



FlGUKlC 3 





(J 



VOL. XXXIV. 3 



T 2 T 



Figure 4. 



3 T 



