Physical description

.1) A class of seven students and one lecturer, c1980

.2) A female in a hard hat, kneeling at a cutting face, with a geological hammer, c1980

.3) A male at a geological microscope, c1973

.4) 3 males in a geology laboratory, with microscopt and VDU, c1978

.5) Five males in a field locationwith electric resistance apparatus, c1974

.6) A male in grey overall at a lapping machine, c1978