Search for all terms: Material: Asbestos? 10 records found.Records with Images(Followed by: text only records)1. Electrical Demonstration Apparatus Built and Used by J. J.... 2. American-Type Radio Tube, USA, 20th Century 3. Experimental Round Radio Valve Type CA, by Ediswan, London,... 4. De Forest Audiotron Radio Valve, by De Forest, Early 20th Century 5. Giant Radio Valve, by GEC, English, 1910s 6. Collection of X-ray Tubes from the War Office X Ray Laboratory... Text Only Records(Preceded by: records with image previews)7. Large Emergency Morse Key, by Marconi Company, London, Early... 8. Large Main Morse Key, by Marconi Company, London, Early 20th... 9. Argus Arc Lamp for Microscopical Use, by W. Watson & Sons,... 10. Microscope Lamp, by James How.
