150 Mr. Carl Barus on the Pressure- Variations of 

 Table III. — Boiling-points of Zinc. 



P. 



T. 



P. 



T. 



P. 



T. 



centim. 



°C. 



centim. 



°C. 



centim. 



°0. 



*ro 



582 



42 



710 



2-6 



675 







3-5 



2-8 



699 

 684 



6-7 

 15-8 



731 



792 



40 



710 



6-5 



732 



6-2 



736 



264 



833 



9-6 



757 



99 



758 



37-5 



864 



101 



772 



166 



802 



47-3 



884 



15-6 



785 



26-4 



838 



57-0 



904 



271 



837 



36-8 



863 



65-4 



916 



34-5 



857 



47-7 



884 



77-1 



933 



425 



873 



55-7 



900 







535 



897 



65-3 



914 







764 



933 



773 



77-3 



t928 



+922 







9. Table IV. contains three sets of experiments with 

 commercial cadmium, the first of which were made in the 

 glass tube. Ebullition in vacuum was obvious ; but inasmuch 

 as the limit of heating-power of the ring-burner is not much 

 above 500°, the remaining thermal data are too low. 



The experiments of the 2nd and 3rd parts of this table 

 were made in the porcelain crucible. They are legitimate ; 

 change of temperature taking place with every change of 

 pressure. I was unable to make the crucible satisfactorily 

 tight. Mean values of somewhat varying pressure had to 

 be inserted. Again, cadmium is more easily superheated than 

 zinc, so that the present temperatures are probably high. 

 Repetitions of the experiment failed from breakage of the 

 crucible. 



Table IV.- 



— Boilin 



g-points of Cadmium. 





p. 



T. 



P. 



T. 



centim. 



T. 





centim. 



°0. 



1 centim. 



°C. 



°C. 



•00 



444 



262 



702 



63 



606 





275 



526 



29-2 



706 



8-4 



622 





5-25 



549 



35-5 



724 



226 



686 





7-70 



562 



38-1 



729 



27-4 



704 









48-9 



745 



750 



34-2 

 51-0 



722 

 752 





2-2 



549 



51-7 





25 



552 



62-4 



760 



563 



760 





2-6 



565 



644 



766 



636 



770 





32 



574 



65-6 



766 



65 6 



772 





7-5 



620 



75-6 



772 



75 - 5 



786 





10-5 



639 



75-6 



770 



75*5 



788 





15-7 



667 



75-6 



774 



75-5 



781 





18-9 



681 













