Final answer:
Aylmer tries to make Georgiana's portrait in metal using a scientific method, but the image is blurred with a hand appearing on the cheek. He throws the failed portrait into corrosive acid.
Step-by-step explanation:
When Aylmer attempts to create a portrait of Georgiana in metal, the outcome is far from successful. Using a scientific process of his own invention that involves the exposure of a polished metal plate to light, the resulting image is distorted. Georgiana's face is blurred and unrecognizable, with the strange appearance of a hand where her cheek should have been. Distressed by this failed representation, Aylmer hastily disposes of the metal plate by throwing it into corrosive acid, indicating his disappointment with the result and possibly symbolizing his repulsion to Georgiana's birthmark, which he is obsessed with removing.