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Improvements in apparatus for heating and ventilating, more especially intended for use in creating currents for the ventilation of sewers / [Stephen Holman].
- Holman, Stephen.
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About this work
London : Printed for Her Majesty's Stationery Office by Darling and Son, Ltd, 1893.
3 pages, 1 folded leaf of plates : illustrations
Contains both the provisional and the complete specification
Patent reference : 1892/20781