of dark Heat-rays by Gases and Vapours. 

 II. 



21 



1. Ethyl Alcohol. 





1 









Deflec- 









Name and 



pressure of 



vapour. 



R . 



Beversal-points. 



B,. 



tion, in 

 divi- 

 sions 



of the 



scale. 



Mean. 



J. 



Pv 



P2- 



P3- 



Pa 



© 



C 2 H 6 



vapour, 

 20 miilims. 



30 



7-5 

 7-0 



836 

 845 

 843 



593 

 592 

 604 



754 



7615 



749 



675 

 674 

 687 



70.13 

 705-0 

 704-7 



698-3 

 697-5 

 697-7 



1 697-8 



93-50 



GO 



1! 



C 2 H 6 0, 



7 inilliuis. 



7-0 

 100 

 12-0 



848 

 845 

 851 



624 

 631 

 630 



783 

 784 

 789 



713 



709 

 715 



733-6 

 734-6 



738-3 



7266 

 724-6 

 726-3 



1 725-8 



97-25 



m 



C 2 H 6 0, 



2-4 miilims. 



90 



7-0 



110 



844 



850 

 856 



640 

 643 

 644 



777 

 794 



798 



739 

 715 

 719 



7420 



743-2 

 746-4 



7330 

 736-2 

 735-4 



1 734-9 



98-47 



II 



Pure dry air. 



13-0 



5-6 



140 



885 

 875 

 381 



661 

 647 

 658 



813 

 798 

 813 



729 

 725 



738 



760-0 



748-9 

 762-6 



7470 

 743-3 



748 6 



1 746-3 



100-00 



o 

 GO 



II 



TO 



C 2 H 6 0, 

 22 rnillims. 



13 

 12 



13 



979 



874 

 877 



625 

 616 

 622 



787 

 780 

 780 



698 

 698 

 709 



730-7 

 725-8 

 730-5 



717-7 

 713-8 

 717-5 



I 716-3 



93-49 



C 2 H f; 0, 



10-0 rnillims. 



12 

 13 

 14 



883 

 885 

 890 



647 

 649 

 650 



802 

 805 

 808 



723 

 735 

 737 



750-2 



756-6 



758-5 



738-2 

 743-6 

 744-5 



I 742-1 



96-85 



*1 



II 



a 2 K 6 o, 



3 - o miilims. 



12 



8 



11 



885 

 872 

 882 



664 

 661 

 660 



820 

 803 

 815 



743 



746 



738 



768-8 

 760-8 

 763-9 



754-8 

 752-8 

 752-9 



1 753-2 



98-30 





Pure air. 



5 



13 

 14 



918 



898 

 902 



670 



685 

 684 



807 

 822 

 817 



764 

 762 



774 



770-3 



779-5 

 780-7 



765-3 



766-5 

 766-7 



1 766-2 



100-00 



2. Acetic Acid. 



p 



6 



CO 



II 



Pure air. 



370 

 374 



380 



813 

 813 

 819 



686 

 691 

 695 



734 

 738 

 744 



692 



698 

 699 



711-9 

 716-7 

 720-4 



341-9 

 342-2 

 340-4 



• 341-5 



100-00 



GO 



C 2 F 4 2 

 vapour, 

 5 miilims. 



380 

 361 



366 



789 

 767 



772 



671 

 651 



656 



715 

 690 

 694 



678 

 664 

 669 



695-5 

 674-7 

 679-7 



315-5 

 313-7 

 313-2 



310-7 

 312-7 

 311-1 



1314-1 

 l 3115 



91-98 



o 

 So 

 II 



C 2 H 4 2 



vapour, 

 5 - l miilims. 



367 



370 

 369 



755 

 773 

 756 



656 

 656 



658 



695 

 703 

 697 



663 

 665 

 666 



677-5 

 682-7 

 680-1 



92-35 



CO 



Pure air. 



370 



383 

 383 



804 



817 

 818 



682 

 691 

 692 



727 

 744 

 745 



691 



698 

 698 



707-9 



719-8 

 720-6 



337-4 

 336-8 

 337-6 



1 337-3 



100-00 



The acetic acid used was probably impure with water and 

 alcohol. The true absorption will therefore be somewhat 

 smaller. 



