OGPSS - Coal power and air pollution

Fifty years ago I began my undergraduate studies at the University of Leeds in the UK. It is not something I particularly dwell on, but the...

Waterjetting 5c - flow straighteners

One of the advantages that became clear, even in the early days of waterjet use in mining, was that the jets cut into the rock away from the...

An unexpected short break

I have been traveling over the past week, and for a variety of reasons it is proving more difficult to get posts produced and posted than I ...

OGPSS - Miles travelled, gas used and OPEC

Leanan has noted the API report of the continuing drop in US oil demand . It would be wrong, I believe, to explain this purely by reference...

Waterjetting 5b - hose connections and nozzle feed

There is often not a lot of choice, when laying out a project, over the path or distance that water must travel from the time it leaves the ...

OGPSS - Happy New Year, or perhaps not!

It is the beginning of a New Year, and, belatedly, I hope that all readers find this new period to be one of prosperity, health and happines...

Waterjetting 5a - Making gift items

There is a time, which can come in late Winter and very early Spring, when demand declines and there is some free time for the occasional ho...