Gilbert light experiments for boys . WINDOW GLASS Fig. 68. Transformations GILBERT LIGHT EXPERIMENTS 41. netting over the Bopening*. Use blackbackgrounds behind Aand B; this is impor-tant. You should alwaystry out your appa-ratus just before youuse it. Look at thewindow glass from Fig 69 How you arrange glass> book> pictures,the audience side, have and candles both lamps lighted, and the boy A will appear to be seated besideboy B. If A appears too low, tilt the glass toward A; if he ap-pears too high, tilt the glass toward B. If the glass is exactlyvertical, A and B will be at exactly th

---

Gilbert light experiments for boys . WINDOW GLASS Fig. 68. Transformations GILBERT LIGHT EXPERIMENTS 41. netting over the Bopening*. Use blackbackgrounds behind Aand B; this is impor-tant. You should alwaystry out your appa-ratus just before youuse it. Look at thewindow glass from Fig 69 How you arrange glass> book> pictures,the audience side, have and candles both lamps lighted, and the boy A will appear to be seated besideboy B. If A appears too low, tilt the glass toward A; if he ap-pears too high, tilt the glass toward B. If the glass is exactlyvertical, A and B will be at exactly the same height.

---

Size: 2515px × 994px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation