N29: left: contours of the 870 μm emission superimposed on the 8.0 μm bubble (σ = 0.05 Jy/beam; contour levels 1, 2, 3, 5σ); right: Spitzer-GLIMPSE 8.0 μm emission in turquoise and Spitzer-MIPSGAL 24 μm emission in red. Several faint 870 μm condensations are present in the direction of the PDR. The brightest one (at 23.104 + 00.584) is bordered by a bright rim at 8.0 μm. Thus, it is associated with the bubble and its central H ii region. This condensation probably pre-existed as it distorts the IF; it is presently compressed by the ionized gas. Some other faint condensations, near b ~ 0.6°, may have formed from collected material.