The apparent discoloration of the dust jacket in the photo is a result of flash & clear wrapper. It is all the light cream color with blue titles & border.
Osgniach, Dom Augustine J. The Analysis of Objects; Or, the Four Principal Categories, an Historico-Critical Analysis in the Light of Scholastic Philosophy. New York: Joseph F. Wagner, Inc, 1938. First Edition. 
Fine tan cloth hardcover, former owner's small ink stamps in several places, rest of text is clean and unmarked. Tight. Very good original dust jacket, dj now in a clear wrapper. Fine in very good dust-jacket. Hardcover.
"Dr. Osgniach's work deals with the necessity of divesting Scholasticism of its antiquated garments and exhibiting it under the attraction of a modern garb, for only in the modernization and general acceptance of Scholastic principles can we hope for the revival of sane thinking upon which civilization in all its branches depends." - publisher.
With Nihil Obstat & Imprimatur.