Photometric tests of globes and shades . Absorpfj on: A?SCP=37% MHCP=39% 2 & \ x \ \ \. /80 Holophone Shade Absorption ? A7SCP=278% 27

---

Size: 1567px × 1594px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, booksubjectph, booksubjecttheses