From H. B. M. JOHNSTON
A problem! Two bottles of milk, one semi-skimmed and one full-cream
homogenised, delivered at the doorstep in warm weather at exactly the same
time and put in the fridge together. The semi-skimmed ‘goes off’ within
a day, but the other is still OK after two days. This has happened more
than once during recent spells of warm weather so I feel this cannot be
a matter of chance, but that there must be a scientific explanation for
the different keeping qualities. What is it?
Mr H. B. M. Johnston London
