Fig. 1
Testing the alum-treatment on an object where the four pieces fit together, ca. 1905. The right piece was alum-treated. The two pieces in the centre were waterlogged. The left piece was the result of air-drying [6]
Fig. 1 | Heritage Science
Testing the alum-treatment on an object where the four pieces fit together, ca. 1905. The right piece was alum-treated. The two pieces in the centre were waterlogged. The left piece was the result of air-drying [6]
