Flat bottomed glass flask and glass extractor from the Soxhlet apparatus
Flat bottomed glass flask and glass extractor from the Soxhlet apparatus, by A. Gallenkamp and Co. Ltd, London, England, 1900-1923
Flat bottomed glass flask and glass extractor from the Soxhlet apparatus, by A. Gallenkamp and Co. Ltd, London, England, 1900-1923