4 media by topic ∙ page 1 of 1
Plate 8048-A. Efficient heater measurements. [illustration].
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
Plate 8046-A. Efficient heater construction.
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
[Plate 8045-A. Efficient heater set up vertically.]
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
Plate 140-X. Illustrates three kettles set in a hot water tank through...
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description