Whilst working with the Geological Museum I met with a newly formed group called 'Engineering Geology'.  Their lab was in the basement of the museum next to our audio visual workshop. Their objective was to apply electronics to the study of minerals.

They were building 'birds nests' of open circuitry to try out ideas. As each  circuit became established I produced it on a printed circuit board for them.

This was the start of over 20 years of projects. They moved to Keyworth in the early 80s.

Most of the projects were concerned with passing currents through minerals and measuring the response.

In 2002 we developed a method of measuring nodules from deep in the oceans.

The specimen would be remotely placed in the chamber which was sealed and returned to the surface, probably with several 1000s of PSI inside. The inside of the tube was covered with many electrodes for pulsing and reading currents in the sample. The connections to the outside world had to stand up to enormous pressures. Theses high pressure feed throughs were made by NASA.

I designed and made the first prototype for laboratory tests.