Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 447
sindividually in an adequate manner. What has been said should beenough to enable one by careful study to decide each case intelligentlyupon its merits. IMany special traps are deserving of more favorthan is generally shown them. It is the fear of seeming to indorse thehorde of cheap competitive… … Fig. 209. Trap with Combined Water-Seal and Gravity-Acting Mechanical Seal. 374
Architecture · Building · Carpentry
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