280 Dr. C. H. Lees on the Thermal 



Table VII. — Interpolated Results (C 12 H 22 Uii). 



Temp. 



Viscosities. 



i 

 1 per cent, i 5 per cent. 



10 per cent. 



20 per cent. 



40 per cent. 



•1476 

 •1133 

 •0895 

 •0730 

 •0607 

 •0508 

 ■04233 

 •03618 

 •03132 

 •02728 

 •02410 

 02140 

 •01908 

 •01722 

 •01553 

 •01414 

 •01288 

 •01182 

 •01093 



o 







•01810 

 ■01537 

 •01331 

 •01168 

 •01031 

 •00911 

 •00812 

 •00737 

 •00670 

 •00609 

 •00555 

 •00511 

 ■00473 

 •00438 

 •00410 

 •00387 

 •00362 

 •00340 

 •00320 



•02048 

 •01729 

 •01488 

 •01292 

 •01139 

 •01009 

 •00901 

 •00809 

 •00732 

 •00668 

 •0C611 

 •00564 

 •00521 

 •00487 

 •00455 

 •00427 

 •00399 

 •00377 

 •00349 



•02436 

 •02050 

 •01754 

 •01518 

 •01328 

 •01173 

 •01041 

 •00933 

 •00843 

 ■00763 

 •00699 

 •00640 

 •00592 

 •00549 

 •00512 

 •00480 

 •00448 

 •00421 

 •00389 



•03720 

 •03042 

 •02578 

 •02212 

 •01910 

 •01674 

 •01485 

 •01319 

 •01180 

 •01059 

 •00961 

 •00872 

 •00799 

 •00732 

 •00676 

 •00629 

 •00586 

 •00548 

 •00511 



5 



10 .. ...... 



15 



20 



25 



30 



35 



40 



45 



50 



55 



60 



65 



70 



75 



80 



85 



90 





My best thanks for valuable advice and direction are due 

 to T. R, Lyle, M.A., Professor of Natural Philosophy, E. F. 

 J. Love, M.A., F.R.A.S., Demonstrator and Assistant Lec- 

 turer in Natural Philosophy, D. Orme Masson, M.A., D.Sc, 

 F.R.S.E., Professor of Chemistry, and to J. M. Baldwin, B.A., 

 who plotted the curves with a considerable amount of care 

 and painstaking. 



Physical Laboratory, 

 Melbourne University, 

 Dec. 11, 1899. 



XXIII. On the Thermal Conductivities of Mixtures and of their 

 Constituents. By Chakles H. Lees, D.Sc.* 



THOSE physicists who have endeavoured to express the 

 thermal conductivities of physical mixtures in terms of 

 the conductivities of their constituents, and the amount of 

 each present, have made use of the formulae 



* Communicated by the Physical Society : read November 24, 1899. 



