| Description | 'Calculations & Performance of Cornish Engines. 1778.' (This item is a thin notebook with a red and green card cover. On the cover is written the preceding inscription. Both covers of the notebook are detached. Inside the notebook there are various hand drawn tables relating to engines and the mining business in Cornwall. Enclosed in the notebook are 15 items. They consist of slips of paper with various notes on them that were originally glued in place.) |