1. Add MS 15511, f 45 Reference (shelfmark): Add MS 15511, f 45 Title: Section of the crater of a geiser as it is supposed to be internally Scope & Content: Cross-section of a geyser vent. With linear scale. Unsigned and undated. Title inscribed in pencil below drawing. Collection Area: Western Manuscripts Languages: English Date Range: 1772 Extent: 1 drawing