Die Zeichenkunst im Dienst der beschreibenden Naturwissenschaften: Mit 6 Abbildungen im Text und 44 Tafeln
A 1922 German guide by Ferdinand Bruns, published for natural science students and draughtsmen, held by Heidelberg University Library, teaching how to draw botanical and zoological subjects accurately. The plates are rotated on the scan and show line drawings of cell arrangements, microscopic organisms, insect wings and moth markings, and leaf venation diagrams. A designer could take from them the economy of contour lines, clear labelling with letters and numbers, and systematic diagrams for organising repeated forms.
