8. PROPORTIONING THE PARTS. Diameter of fan wheel required; speed at which the fan must run; power required to run the fan; size of engine required; steam used by fan engine; choosing the fan for forced draft, for induced draft without economizer, for induced draft with economizer; location of the fan; breeching and up-take; inlet chamber; discharge chimney; by-pass; water for bearings. Appendix. Tables. Index. 156 pages. 13 plates. 16mo. Cloth, $2.00. * * * * * THE AUTHORITY ON THIS SUBJECT. CENTRIFUGAL FANS. A THEORETICAL AND PRACTICAL TREATISE ON Fans for Moving Air In Large Quantities At Comparatively Low Pressures. BY J. H. KINEALY, M. Am. Soc. M.E. Past-President American Society Heating and Ventilating Engineers. The matter in this book was a series of articles written for the _Engineering Review_. The favorable attention which they attracted lead the author to believe that there was a real demand for a book treating in a theoretical as well as a practical way on centrifugal fans. The articles have been thoroughly revised, added to, and made as complete as possible. Contents of Chapters. 1. Flow of Air; Volume of Air Flowing; Pressure Necessary for required velocity. 2. Vortex; Vortex with Radial Flow. 3. Fans; First Type of Fans; Second or Guibal Type of Fans; Third Type of Fans; Modern Type. 4. Fan Wheel; Vanes or Floats; Inlet; Width. 5. Capacity; Blast Area; Effect of Outlet on Capacity; Air per Revolution. 6. Pressure; Work. 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.[++]= * * * * * CHARTS FOR LOW PRESSURE STEAM HEATING for the use of ENGINEERS, ARCHITECTS, CONTRACTORS AND STEAM FITTERS. By J. H. KINEALY, M.E. _M. Am. Soc. M. E., M. Am. Soc. of H. and V. Eng'rs, &c., &c._