Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 211
called the three-quarterhousing may be used, in which the lowerpart of the casing is replaced by a brickor cemented pit extending below the floor-level as shown in Fig. 145. Another form of centrifugal fan isshown in Fig. 146. This is known as thecone fan, and is commonly placed in anopening in a… … Pig. 141. Centrifugal Fan or Blower.
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
