7. Horse Power Required to Run a Fan; Engine Required to Run a Fan; Motor Required to Run a Fan; Width of Belt.
8. Efficiency; Air per Horse Power.
9. Exhausters.
10. Housing; Dimensions of Housings; Shaft.
11. Cone Wheels.
12. Disk Fans; Number of Revolutions per Minute; Capacity of a Disk Fan; Horse Power Required.
13. Choosing a Fan. Index.
Twenty-two tables have been prepared and they have been arranged in the way, which the experience of the author in designing heating and ventilating plants has shown to be the most convenient. The tables are full and complete, all calculations having been very carefully checked, read and revised. XIV. + 206 pages, 39 diagrams. Full limp leather pocketbook.
Round Corners, gilt edges. $5.00.‡