He used a camera obscura and a pewter plate coated with bitumen of Judea, an asphalt derived from petroleum. After exposing the plate, he washed it with lavender oil and petroleum to remove the ...
32.4 x 40.8 cm. (12.8 x 16.1 in.) ...
A "significant" hoard of Roman items discovered in Suffolk has gone on display. Pewter plates, platters, bowls and a cup were found in Euston last year by a local metal detectorist. The way the ...
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