Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] A B A, jar of water containing pond scum; B, same jar after an hour in the sunlight. Spirogyra: n, nucleus; s, chlorophyll bands. Suggestions for Observational Work} — Under the low power of the micro- scope, try to make out the length of one of the filaments of Spirogyra. Do * For fvdler directions, see Hunter and Valentine. Manual, page 79.

---

Size: 3343px × 598px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage