MANUAL plastic pocked containing 4 small sheets of paper

MANUAL plastic pocked containing 4 small sheets of paper. One has a conversion table on one side and a Comparative table on the other. The second one has a rate/ phase comparison table, the final two have hand drawn diagrams one titled star delta 60 & 100 amp and the second one is titled No2 twist frame starter end. This was in the back of item DUNIH 2022.7.4.1 Oil Break & Oil Immersed Electric Switchgear Installation and Maintenance which was produced George Ellison Limited. Was owned by Alexander Morris who was the maintenance engineer at Caird Ashton Works from 1962 -77.
Part of a collection of items donated by Ann Grant Robertson the sister of Alexander Morris.