234 



J. M. Lewis : 



at NxlO L> , and violet at NxlO 3 ; undergoing no further change 

 Nx2, it becomes green at one of Nxl, green blue at NxlO 1 , blue 

 in decreasing concentrations. Again, phenol-phthalein is colour- 

 less in hydrogen ion concentrations, ranging from Nx2 to NxlO -8 , 

 but it becomes rose coloured at NxlO 9 , red at NxlO -10 , and 

 thereafter remains unaltered. 



?MQ. 



B£&fLU.Qii£-al 



Intestinal contents 

 Pancreatic juice 



Blood 



9.5 



<L ... 



\ 



L ! 



J Human milk 



~ Saliva 



Cow's milk 



6.5 



6 



5.5 



5. 



4,5 



'JSSLC&J&IUk 



Tryps in ..on ...nine in.. 



Ere p sin 



JtotraULty 



^^.Maltaee - 

 <5*fjf88i8 /casein 



2 



I 



Urine 



Infants gastric juiqai 



c.cpOLH.HCl (4. oi) 

 0. COIN. acetic (3,87 



0. 00 IN. HC 1.(3.01) 

 0. IN. acetic (2.8?) 



Invertase 



N. acetic acid (2.37) 

 3.CIN.HC1 (2.02) 



Adult 



gastric juice(o-9-!«o^ 



Pepsin 



