The association between New York City’s all-over structure and the play that unfolds within it relative to difference and identity is very pertinent but is not specific enough, in my opinion. On the one hand, all of Mondrian’s neoplastic works are constituted by an opposition between the variable and the invariable . On the other hand, the type of identity produced in New York City relies on repetition, a principle which, we know, explicitly governs a whole range of paintings predating (...) neoplasticism. New York City differs from the “classic” neoplastic works, as well as from the 1918-19 modular paintings with which it seems to have a good deal in common. It is, in part, because he never discusses this last point that Masheck doesn’t entirely grasp the amplitude of the reversal that Mondrian effected in his New York works.In fact, as James Johnson Sweeney realized quite early, one must go back o the 1917 works, which gave rise to modular grids for the two years that followed, in order to understand what happens not only in New York City but also in the two Boogie-Woogie paintings.3Everyone is aware of the extraordinarily rapid evolution of Mondrian’s work during the years immediately preceding the foundation of neoplasticism: under the influence of Bart van der Leck, he dopted the colored plane and the black dash on a white background as elements of his composition for the two Compositions in Color, A and B . Mondrian, who had not yet found a means of perspicuously relating these diverse elements , tied both plane and dashes together by way of an optical dynamism, based largely on their superimposition. The immediate consequence was to make the background recede optically. The next step was the five Compositions , all entitled “With Colored Planes” . Here all superimposition was eliminated, as well as all “line.” In the last two of these canvases, the background itself is divided without remainder in to planes of different shades of white. The colored rectangles are on the way to alignment. In spite of this, the rectangles fluctuate and, consequently, the background is hollowed out behind them. 3. See James Johnson Sweeney, “Mondrian, the Dutch and De Stijl,” Art News 50 : 63. Meyer Schapiro made a similar remark, at about the same time, in his courses. 4. When I refer to a number accompanied by “Seuphor,” it refers to the “catalog by group” included in Michel Seuphor’s book on the artist. See Seuphor [Ferdinand Louis Berckelaers], Piet Mondrian; sa vie, son oeuvre, 2d ed. . Yve-Alain Bois is associate professor of art history at the Johns Hopkins University. He has published a number of essays on twentieth-century art, architecture, and criticism and is currently working on Mondrian’s neoplastic years and on a history of axonometric perspective. Amy Reiter-McIntosh is a lecturer at the University of Chicago. Her previous contribution to Critical Inquiry was a translation of Ernesto Laclau’s “Psychanalyse et marxisme”. (shrink)