. Architect and engineer. garranged in tangential relation tothe radial tunnels, to the end thateach transport plane can approachthe tunnel or leave the tunnel at atangent and thus avoid any planeat a following or adjacent tunnel. —Acoustic CorrectiveMaterial. Carlisle K. Roos ofWheaton. Illinois. Assignor toU. S. Gypsum Co. of Chicago,Illinois, a corporation of Illin-ois. Patented Mar. 14, acoustical corrective materi-al, suitable for molding, has re-cently been invented by CarlisleK. Roos. The formula of the com-position is as follows: Pounds Alpha gypsum 2000 Calcium carbon
. Architect and engineer. garranged in tangential relation tothe radial tunnels, to the end thateach transport plane can approachthe tunnel or leave the tunnel at atangent and thus avoid any planeat a following or adjacent tunnel. —Acoustic CorrectiveMaterial. Carlisle K. Roos ofWheaton. Illinois. Assignor toU. S. Gypsum Co. of Chicago,Illinois, a corporation of Illin-ois. Patented Mar. 14, acoustical corrective materi-al, suitable for molding, has re-cently been invented by CarlisleK. Roos. The formula of the com-position is as follows: Pounds Alpha gypsum 2000 Calcium carbonate - 57 Aluminum sulphate 89 Gum arable 10 Fine wood fiber 44 Water to bring to molding con-sistency. BUILDING CONSTRUCTION Recent Contracts Completed Y. W. C. A. Building San FranciscoLibrary Building Berhelei;Post Office Building OaklandCity Hospital Palo AltoHome of the Blind Berkeley K. E. PARKER CO., INC. 135 South Park San Francisco Phone KE arny 6640 Good BuiMings DeserveGood Hardw^are ^\C1-: H.\R1JW.\RK C(l]. 581 Market Street SUtter 6063 OfficePartitions Reinhold sectional wood partitions (interchange-able) may be adapted to anymodem office requirement in anew or old building. Complete Information Filesent on request Pacific ManufacturingCompany High Class Interior FinishQuality Millwork Monadnock BIdg., «41 Merrill Are.,San Frandico Lob Angelea GA rficld 7733 AX rids* 9011 1313 Seventh Street, OaklaadGL cncoDrt 7830 The Architect and Engineer, July, 1933 Index to Advertising Announcements For Classified List of Advertisers see Pages 77, 78, 79 Aladdin Heating Corp 74 American Rolling Mill 71 Anderson and Ringrose 75 Apex Mfg. Co 74 B BassHeuter Paints 75 Bay State Brick fe? Cement 69 Brown Hardwood Co., G. H 68 California Sales Co., Inc 69 Cabot Inc., Samuel * California Shade Cloth Co., Inc 68 Clark fe? Sons, N 8 Clinton Construction Co 69 Clarcmont Hotel 67 Crane Company 72 D Dalmo Sales Corp 67 Dickey Clay Mfg. Co., W. S 70 Dinwiddie Construction C
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