New Monthly Charts in Millibars

I’ve recently had a print run of 300 standard barograph charts for a monthly clock rotation in the more commonly used millibars scale. These are in a light green. I still have a supply of the same monthly chart (printed in red) and in the earlier style of inches.

As I’ve mentioned in a previous blog, the monthly chart is a 300mm condensed record of barometric pressure compared to 1200mm combined length of four weekly charts.  I have a few mechanical monthly rotation clocks for sale on my website starting at £325 which can fitted to most conventional style barographs.

And just for the record, 300 monthly charts, 12 each year – that’s 25 years’ supply!

Part of red chart showing the dramatic start to September