817-196144 - Piled stones to mark the road in the mountains Valley glacier with its longitudinal moraines of the Glacier Alesht At the bottom the summits of the Monch, the Junfrau and the Eiger Berneses Alps Switzerland
823-533 - Light Micrograph (LM) of a longitudinal section showing xylem elements of old sunflower stem (Helianthus sp.) showing spiral chloroplasts, magnification x1200