. Elementary entomology . Y\G. 46. rilustrating mode of vision in compound eye " The light enters through the cornea. The rays which strike the sides of each tube or cone are absorbed by the black pigment which surrounds the tube. Ac- cordingly those rays of light only which pass through the crystalline cones directly (or are reflected from their sides), such as a-a', b-b', c-c', d-d', e-e', will ever affect the nerves at a', b', c', d\ c'." (After Lubbock, from S. J. Hunter)

---

Size: 2762px × 1810px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912