San Francisco : Architect and Engineer, Inc · leaf 359
ermanent,trouble-proof protection to underground pipes.Insulation may be any of four types, but Ric-wiL Dry-paCwaterproof filler is by far the most effective. Dry-paC staysfirmly around the pipes regardless of vibration, and officialtests of installed hnes show 92%to 94% efficiency.Ric-wiL…
Architecture · Building
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![An illustration from Wedding's Basic Bessemer Process. Translated [from the supplement to the author's Darstellung des schmiedbaren Eisens” entitled, “Basische Bessemer oder Thomas Process”] ... by W. B. Phillips ... and E. Prochaska ... With a supplementary chapter on dephosphorization in the basic open-hearth furnace, by E. Prochaska (1891)](https://img.insideoutlibrary.com/img/200/bl-bl_003874923_0-85-1.webp)
