Jigsaw Puzzle : Lecture on Stephen Grays discoveries in electricity
Jigsaw Puzzles from Mary Evans Picture Library
Lecture on Stephen Grays discoveries in electricity
A lecture at the Charterhouse, London on Stephen Grays discoveries in electricity. In the early eighteenth century, Gray demonstrated that charges of electricity could be conducted by some materials for distances as great as 765 feet, while others did not conduct electricity at all. Eventually, he was able to send charges through 88 metres of wire suspended on silken threads to operate an electroscope - an instrument used to detect static electricity. By sending an electrical signal from one place to another, Gray established the basic principle of the electric telegraph
Media ID 4361590
© Illustrated London News Ltd/Mary Evans
1874 21st Basic Charges Charter House Conduct Conducted Demonstrated Detect Discoveries Distances Eighteenth Electric Electrical Electricity Established Eventually Feet Gray Instrument Lecture Materials Metres Operate Principle S End Sending Signal Silken Static Stephen Suspended Telegraph Threads Wire
Jigsaw Puzzle (520 Pieces)
Made in the USA, 520-piece puzzles measure 16" x 20" (40.6 x 50.8 cm). Every puzzle is meticulously printed on glossy photo paper, which has a strong 1.33 mm thickness. Delivered in a black storage cardboard box, these puzzles are both stylish and practical. (Note: puzzles contain small parts and are not suitable for children under 3 years of age.)
Jigsaw Puzzles are an ideal gift for any occasion
Estimated Product Size is 50.8cm x 40.5cm (20" x 15.9")
These are individually made so all sizes are approximate
Artwork printed orientated as per the preview above, with landscape (horizontal) or portrait (vertical) orientation to match the source image.
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