This book shows the gorgeous building of the Heisler in 3/4" scale may also be scaled up to 1 1/2" for 7 1/4" or 7 1/2" gauges. Work in millimeters or inches. Fabricate your own pressure gauge and dead weight tester! His instructions for fabricating parts and his magnificent drawings and crisp photos combine to make the construction of the Heisler a far easier and more satisfying task. Virtually every part can be produced without the necessity for castings. 248 Pages, Hardcover.