QUESTIONS

Q : My grandmother gave advice about colour combinations in clothes, beginning: ‘Blue and green should never be seen, unless there’s a colour in between.’ Does anyone recall the full list? Brian Kane, Beaconsfield, Bucks. Q : If a moving electric field produces a magnetic field, does a moving gravity field have its own magnetic equivalent? Hannah White, Ipswich, Suffolk. Q : When was autism identified? Are any well-known historical figures now thought to have had the condition? Mrs W. Charms, St Ives, Cambs.