Agriculturally Useful or Harmful Insects, Vintage Wall Chart, 1920ABOUT This antique wallchart is plate nr 5 of a series of school charts, which were designed and produced by Dr. Jger and Dr. Hofmann. It is made out of paper and linen. It shows different types of insects and their influence on agricultural crops. DETAILS detailed condition Slight traces of use due to its age materials paper, linen width 85 cm depth 0,1 cm height 75 cm