49 





3-"- o 



ft.8<3 



g.3 



a 1,8 

 5-5 



S <D 



a - 



sil 



^ JD ri 



III 



10 per cen 

 sodium hydi 

 solution. 

 (5-10 drops 



38 





| g8S 



a 



[Cir.63] 



