A Simple Automatic Short Photoperiod Device.

Lignende værker

• An Automatic Apparatus to Cover and Uncover Plants in Photoperiod Experiments
  af: Kramer, Paul J.
  Udgivet: (1947)
• Simple Device for Automatically Transferring Broth Cultures
  af: Wilkins, Judd R., et al.
  Udgivet: (1974)
• A Modification of the Celluloid Holder for Cobalt Chloride Paper
  af: Greulach, Victor A.
  Udgivet: (1947)
• A simple device for counting microorganisms
  af: Biles, J. E.
  Udgivet: (1973)
• THE EFFECT OF MALEIC HYDRAZIDE ON TOMATO PLANTS IN RELATION TO THEIR AGE AT THE TIME OF TREATMENT
  af: Greulach, Victor A.
  Udgivet: (1951)