Experiment towards calotype from NB-Q [Notebook Q]
Created: 23 Oct 1840
Image size: h 5.9cm x w 3.4cm
Object Type: Paper Negative
Physical description: no image visible
Inscription: in pencil, verso, 10" [ten second exposure]; in turquoise ink, verso, å very dark weather Oct 23/40 [und>brought out<und] 7 hours after; pencil rule lines along two edges, recto
