A dumpy level is a surveying instrument used to measure and establish level points on construction sites and land projects. It helps ensure surfaces, foundations, and structures are properly aligned ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. E. G. Fischer and his colleagues in ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This instrument is marked "C. L.