222 Mr. W. Sutherland on a 



Aluminium. — Fine commercial wire. 1 56*5j m *453, p 2*56. 



Temp. C 18° 102° 



n x 1-605 1*559 



n 2 1-142 1-090 - 



10~ 6 q 662 616 



n\-n\ 1-28 1*24 Theory 1-36. 



Aluminium (unannealed) . — Fine commercial wire. I 62" 5, 

 m "5, p 2*56. 



Temp. C 18° 63° 104° 



n v 1-335 1-319 1*295 .... 



n 2 0-762 0-740 0*722 



10-«q 602 584 561 



n\-n\ 1-20 1*19 1*16 Theory 1*23. 



Iron (specimen I.). — Commercial tough wire. I 66*7, 

 m 4-04, p 7-55. 



Temp.C 18° 67° 103° 



Wl 1*830 1-811 1*804 



n 2 1*412 1*395 1*383 



10- 6 ? 2029 1984 1960 



n\-nl 1-35 1*33 1*34 Theory 1*15. 



Iron (specimen II.). — Commercial wire (soft). I 67*2, 

 m 9*88, p 7*55. 



Temp.C 18° 66° 102° 



Wl 2*662 2*636 2*608 



n 2 2*400 2*370 2*350 



10-«q 2071 2024 1983 



n\-n\ 1-33 1*33 1'28 Theory 1*14. 



Tin. — A cast rod was hammered out to three times its 

 length. To make the period conveniently measurable with a 

 watch it was necessary to load this rod at the end. The 

 length of the rod was 40*1 centim., and the distance of the 

 centre of mass of the load from the clamped end V 41*2, the 

 mass of the rod m 16*2, and the mass of the load M 15*95, 

 p 7-29. 



Temp.C 16° 66° 104° 



n x 2-72 2*49 2*33 



n 2 2-34 2*12 2*00 



10" 6 ? 513 425 374 



n\-n\ 1'92 1*71 143 Theory 1*73. 



