Framed Prints
Framed Print of Professor Tyndall lecturing at the Royal Institution, 1870. Creator: Unknown
Professor Tyndall lecturing at the Royal Institution [in London], 1870. Professor Tyndall...after explaining the apparatus termed a contact- breaker, employed in connecting and disconnecting the helix with the battery, and thereby making and breaking the circuit, which he elucidated by illustrations, exhibited the principal phenomena of the magnetic force. This force, which is really distributed through the mass of a magnet, appears to be concentrated at two points near the ends, termed poles, endowed with two opposite kinds of magnetism, one end termed north and the other south...In this doubleness consists magnetic polarity. The central portion of a steel bar-magnet was shown to be neutral, but when the magnet was broken into pieces every piece was shown to be endowed with polarity, a property residing in every particle. This property was also shown to be possessed by the copper wire constituting the helix of an electro-magnet, a suspended helix behaving like a magnetic needle. This magnetic power is distributed through the mass of the earth, with similar concentration at the poles. Professor Tyndall then demonstrated that by varying the power of the helix we vary the strength of the iron core within it'. From Illustrated London News, 1870. Heritage Images features heritage image collections. © The Print Collector/Heritage Images
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Media ID 39240624
Apparatus Battery Demonstrating Demonstration Displaying Electricity Electromagnetic Electromagnetism Irish John Tyndall Lecture Lecture Hall Lecture Theatre Lecturer Lecturing London England United Kingdom Magnet Magnetism Physicist Physics Pointing Professor Professor John Tyndall Royal Institution Showing
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
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Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 20.2cm x 19.3cm (8" x 7.6")
Estimated Product Size is 36cm x 31cm (14.2" x 12.2")
