Manuscript, 'Two rainbows counterchanged; the lowermost doubly whyed [wide] downwards, and colored in the same order as the second' by Henry Oldenburg Also attached are some eclectic notes by Henry Oldenburg about winds, lead and black lead, Roman vitriol, garden and flowers, springs, medical remedies, madness, music, salmon, pearls, agriculture, spontaneous plants, cutting of coppices, hedges, broom, teazels, dairy, yeast, malting, bees, sheep, wool, freezing, glue, staunching of blood, emmets, unusual births, small pox, plague, mortar. Subject: Natural Philosophy 1651