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Chapter 11 Plenty of Slide Rule - Pg. 227

Chapter 11 PLENTY OF SLIDE RULE Yet I confess I like it the better, because it pleaseth not your palate, to which nothing can savour, that is learned and Analyticall: but onely the superficiall scumme and froth of Intrumentall trickes and practices. Oughtred (1634) We want to ask you to imagine you are the captain of a super- tanker that is docked in port and being loading with oil. Your tanker has a number of separate tanks, perhaps of different volumes, and oil is being pumped aboard. If you decide to fill one tank at a time then the ship will capsize, so you need to balance the ship by part-filling tanks around the vessel. Oil varies