Philip Eden wrote:

When I first started observing officially, in the early-1970s, I was
bemused by my co-observers' - mostly elderly gentlemen - habit
of reporting temperatures ending in .5 or .0 rather more frequently
(in one case, much more frequently) than ought to have been the case.
I was green enough and brash enough on one night duty to make
histograms of each observer's decimal-point count, thinking that
I'd identified a form of incompetence or laziness. Now that I need
reading-glasses myself for checking thermometers, especially by
torchlight at night, I finally understand why.

Philip



Ah yes, I failed to add, without glasses it would all be pure guesswork :-)

--
Keith (Southend)
http://www.southendweather.net
e-mail: kreh at southendweather dot net