286 Mr. 1ST. Eumorfopoulos on the Determination 



i°\ 2. 



mmw wmmammmmmm 

 ■■■■■■■■£»■■■ 



■snap; 



fMwmmwwm 



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5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 

 Deflexion iu centimetres of scale. 



When the temperature of the rod has settled down to its 

 regular cyclic state, the excess of temperature u of any par- 

 ticular point at any instant t may be expressed by 



u = a + b i sin \2tt r p +ftl + 5 s sin / 4^^ ~f &) 



+ b 3 sm\67r!~+j3) + . . . , 



where T is the time-period of the alternations. 



