DURlNG the experience of a designer of steel cylindrical tanks for containing liquids such as water, oil, etc., or any liquid having a specific gravity not, differing appreciably from unity, the opinion was formed that the usual method of computing the sizes of tank side plates by numerical calculat8ion was not by any means an ideal one, as, in order to arrive at the most economical design, it was usually necessary to work out numerous examples before being in a position to decide upon the final construction. It was tlhought that if a graph could be constructed to obviate the necessity of so many calculations, it would simplify matters considerably and would also make the comparison of alternative designs an easy task.
H. Bott