931 
FABLE: IE 
Na — “quenched”. 
Temperature Data Spec. Heat Mean 
Br: Aug. 29 0.2892 
0.2874 
0.2864 0.2870 
0.2852 
40°. 16 Aug. 30 0.2973 
0.3002 | 
0.2953 | 0.2981 
0.2992 | 
0.2983 
68° .60 Aug. 31 0.3024 
0.3049 
0.3073 
-- 0.3040 
68° .60 sept. 2 0.3034 
0.3020 
0.3038 
822.15 Sept 0.3087 
0.3094 
0.3095 0.3089 
0.3079 
94° .02 Sept. 4 0.3195 
0.3213 
0.3192 0.3200 
0.3200 
corresponding temperature. The measurements of 8 Aug. giving the 
value 0.2953 (at 49°.38) having been completed, the metal was taken 
out of the calorimeter, heated up to 100° (melted) and allowed to cool 
rapidly in air. The value then obtained for the specific heat (at 
49°.38) was 0.8014. Again heating to 100° (melting) and allowing 
to cool very slowly, gave the value 0.2953 (at 49°.38), identical 
with the value previously obtained for the ‘‘annealed” metal. 
Evidently the process is a reversible one. 
10. We shall now consider the diagram (fig. 1 See next p. 932) 
which represents the results graphically. The broken line apd 
represents the results of the determinations after the sodium had 
had been quenched whilst the curve cpd represents those concerning 
the solid metal. This diagram is also given by Ezer Grirritus with- 
out any commentary. 
