parts of the stove as are neces- tion to its breadth. ing out their six years' contract with the Paris municipality sary to explain the action of the damper rings, and the flue Now, as a beam increases in strength as the square of its the engines of the contractijg company there have already depth,… … VAN DE MARK'S DAMPER RINGS. that it consists of an outer and inner shell be consolidated by the comparatively narrow inclosing an annular space divided by a ver- and light fellies of ordinary vehicles. tical partition, G. The bottom of the annular space is closed must quadruple its strength ; but…
Patents · Air · Cast · Water · Iron · Cast Iron · Soluble · Cast irons · Antedated september · Green sand · Living matter · Cold water · Chemical paint · Scientific American · Steam engine · Special attention
Internet Archive · Public domain (published before 1931). Free to use for anything.
