DEGREE OF CONSTANT TEMPERATURE. 
75 
able 5. — Constancy of temperature in the later form of zinc boiling-point apparatus ; 
time series — Continued. 
Date. 
Time. 
h. 
No. of. 
thermo- 
couple. 
e2 . 
T s . 
Tzn. 
llemarks. 
h. m. 
ay 19, 1884 
3 00 
0.00 
18 
8370 
800 
855 
Charge large. 
15 
0. 25 
18 
8750 
. 827 
885 
30 
0.50 
18 
8960 
841 
903 
3 r > 
0.58 
18 
9050 
847 
911 
40 
0.67 
18 
9050 
848 
911 
4 20 
1.33 
18 
9270 
863 
929 
30 
1.50 
18 
9590 
885 
055 
Central tube cracks. 
5 00 
2.00 
18 
0330 
934 
1012 
Superheating. 
ay 21, 1884 
3 25 
0.00 
18 
7890 
764 
814 
Charge large. 
35 
0.17 
18 
8250 
790 
845 
4 00 
0.58 
18 
8630 
819 
876 
10 
0.75 
18 
9030 
847 
910 
20 
0.92 
18 
9120 
853 
915 
30 
1.08 
18 
9240 
862 
926 
35 
1.17 
18 
9310 
867 
932 
40 
1.25 
18 
9360 
870 
936 
5 00 
1.58 
18 
9500 
879' 
948 
Central tube cracks. 
03 
1.63 
18 
9540 
881 
951 
Superheating. 
ay 26, 1884 
2 25 
0.00 
22 
8840 
828 
890 
Charge large. 
35 
0.17 
22 
9081 
845 
908 
45 
0.33 
22 
9110 
847 
910 
Ebullition. 
3 05 
0.67 
22 
9160 
849 
915 
15 
0.83 
22 
9200 
852 
918 
35 
1.17 
22 
9300 
860 
927 
50 
1.42 
22 
9330 
863 
930 
4 20 
1.92 
22 
9470 
874 
940 
40 
2.25 
22 
9450 
870 
940 
Crucible explodes. 
me 9, 1884 
2 15 
0.00 
19 
716 
(672) 
Charge large. 
30 
0.25 
19 
741 
(696) 
45 
3 05 
0.50 
0.83 
It) 
19 
782 
855 
(735) 
(805) 
15 
1.00 
19 
934 
(880) 
19 
1.07 
19 
981 
(925) 
20 
1.08 
19 
987 
(930) 
25 
1.17 
19 
2864 
987 
930 
30 
1.25 
1.42 
(20) 
40 
(20) 
2830 
975 
920 
55 
1.07 
(20) 
2784 
960 
907 
4 10 
1.92 
19 
2769 
954 
901 
25 
2.17 
19 
2767 
954 
901 
40 
2.42 
19 
2738 
944 
891 
55 
2. 67 
19 
2737 
944 
891 
5 08 
2.88 
19 
2732 
912 
890 
25 
3.17 
19 
2755 
950 
899 
40 
3.42 
19 
2803 
966 
913 
50 
3.58 
19 
2809 
968 
915 
ine 11, 1384 
3 45 
55 
0.00 
0.17 
19 
19 
2808 
970 
915 
4 00 
' 0.25 
19 
2806 
909 
915 
07 
0.37 
19 
12 
0.45 
19 
2848 
982 
925 
18 
0. 55 
19 
25 
0.67 
19 
2815 
970 
915 
(729) 
