The Torricellian column stands unshaken at 29.99 inches, its summit a perfect meniscus of quicksilver that neither rises nor falls—a glassy eye staring back at the firmament. Beside it, the brass dial of the aneroid confirms the stasis, its needle frozen as if bewitched by the mountain's breath. Beyond the casement, the hair-hygrometer hangs limp, its human-hair strand swollen with the day's gentle dampness, while the copper weathercock above the gable swings lazily from the west, its beak pointing toward the setting sun with the indifference of a creature that has seen centuries of storms. Th…