Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 756
ts. 3. Seamless Interior. 4. Porcelain Lining. 5. Increasing Width at every Inlet. 6. Vertical Insertion of Mail. 7. Frequent Expansion to assist Action of Gravity. 8. Telescopic Joints allowing for Settling of Buildings. 9. Pocket for the detention of Abnormal Mail. 10. Free Independent Path… … PRODUCTS—Standard Combination Vestibule Tube-Phone and Mail Box, and Inter-Communi-catory Systems for Apartment and Flat Buildings. STANDARD COMBINATION VESTIBULE TUBE-PHONE AND MAIL BOX—The unsatisfac-tory and inefficient systems of inter-communication which are used in the flat and apartment…
Building materials
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