434 



The National Physical Laboratory. 



10 



li 



pq 



o 8^ 



tn v a 

 1-1 Ci 03 



o 









r-H 



CO I— 1 







CO 



o 













E3 

 O 



ft C3 



h ^2 

 o O 



ftrH 



«!■* si 



CD 



tO o 

 03 



>s «o ° H" ts 



" *> S 3 

 P 



c3 (M 



to 



^3 



s3 



la 

 pq 



pq 



o 



© co 



Cg P* .03 



H3 « o ^ 



a ^ o g 



1 o — 



ftpq 



ID 





O 



TP 









o 



CO 



CO 







o 









=f8 



o 





pq 



V.O 



C3 



CO 



^ . 



so 

 CO 



03 3 . 



id © 

 ft 



CS 43 • 



| s . 



O 



a o 



O ft . 



P* . • 



03 • • 



Soi : 



03 CO 

 03 



3 © 5 

 9 



p as CO 

 ^ 



03 s ce 



-g, 



o 



OS 



1-1 a 



S3 



. 03 



^ a 

 £ g 



C? c£ 



m 



©^ 



o a 



S3 OS 



<S te 



Is 



pq | 



33 



m 



H 



o ^ 



P <to 



03 



as p- 

 a s w 



03 (> O 



C3 O 



m CO 



03 



