7 Up

From time to time I comment on the magical powers and ubiquity of the number seven. See for example reference 1.

I also associate this morning to the soft drink '7 Up', which, as a child coming from a household which did not approve of carbonated drinks, I thought great stuff when introduced to it on a visit to Canada.

And even earlier this morning, I came across another instance, illustrated left, in the technical literature, demonstrating once again that technicians are no more exempt from the magic than the rest of us. Perhaps even less so. And perhaps, given the present dearth of trolleys (see reference 2), I shall start to collect sevens instead.

With thanks to Hiroki Sayama and his institution SUNY, from whence this particular literature came.

Reference 1: http://psmv2.blogspot.co.uk/2015/08/the-freudians-fight-back.html.

Reference 2: http://psmv2.blogspot.co.uk/2015/06/trolley-34.html. Way back in June.