20 Report on the Solar Eclipse 'Expedition to Sahdol. 



ing particulars for a number of readings on January 21, 22 and 23 

 are given as illustrations : 



Excess of Readings of Thermometers over the Typical Curves shown 



in the Diagram. 



Dry bulb. Wet bulb. 



Hour. Jan. 21. Jan. 22. Jan. 23. Jan. 21. Jan. 22. Jan. 23. 



GA.M 1-9 1-3 4-M -1'6 0'6 4-0'8 



8 .... -1-4 4-0-5 4-2-0 -1'8 -0'3 4-T8 



10 .... -1-5 4-1-5 4-2-8 -0-8 -0'6 4-M 



NOON 2-6 4-1-3 4-1-9 -0'8 4-0-2 4-0'S 



1 P.M -1-6 0-0 4-2-0 -1-9 -1-0 4-2-1 



2 .... -0-8 -9-0 4-1-0 -1-6 -3-5 4-1-5 

 4 .... -0-6 -2-6 4-0-4 -0-3 -0'5 4-1-5 

 G .... 4-3-0 -2-3 4-1-1 +0-2 -0'6 -0-9 

 8 .... -1-6 -0-6 4-2-0 -1-6 +0-1 4-1-8 



10 .... -1-9 4-0-3 4-2-3 -0'8 4-0'G 4-1-8 



[The anomalous readings of dry bulb at 6 P.M. on January 21, and 

 of wet bulb at 6 P.M. on January 23, are apparently not mistakes, 

 unless the neighbouring observations are similarly affected.] 



We may thus take it that the typical curves of the diagram 

 represent with considerable accuracy what would have been the state 

 of things on January 22, if the eclipse had not taken place. 



Comparing then the readings during the eclipse with this curve, 

 we get the following differences, which may be regarded as the effect 

 of the eclipse. 



Effect of the Eclipse on Temperature as shown by Five-Minute 



Readings. 



Time of day. 



hrs. ruins. Dry bulb. Wet bulb. 



(NOOS) 4-1-2 -0-1 



5 0-0 -0-7 



10 4-0-8 -0-2 



15 First contact 4-l'7 4-0'2 



20 4-1-5 4-0-1 



25 4-0-8 -0-9 



30 4-0-6 -0-5 



35 4-0-4 0-0 



40 4-0-3 -0-1 



45 4-0-2 -0-1 



50 0-5 0-2 



55 -0-6 -0-4 



