Eugene de Salignac may have been shooting in an official capacity — he was, after all, the staff photographer for the New York City Department of Bridges, Plant and Structures — but his pictures have an air of whimsy and nostalgia rarely seen in governmental commissions. Scattered on the Brooklyn Bridge like a human constellation, De Salignac’s subjects are clearly unafraid of heights. Aesthetes and industrial enthusiasts have one more week to catch (no pun intended) this work and others at the Museum of the City of New York in “New York Rises.” —Rachel Wolff