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Jean Jallabert investigating the effects of points and knobs on electrical discharges, from Les Merveilles...

IMAGE number
KWE3614200
Image title
Jean Jallabert investigating the effects of points and knobs on electrical discharges, from Les Merveilles de la Science, pub.1870
Artist
French School, (19th century) / French
Photographer
Ken Welsh
Date
C19th AD
Image description

Jean Jallabert, 1712-1768, investigating the effects of points and knobs on electrical discharges whilst standing on a wax insulating platform, one hand touching an electrostatic generator and the other holding a pointed piece of wood. When its point neared one end of a conducting rod mounted on a pivot, the deflection of the rod caused by the discharge showed whether there was a positive or negative charge. From Les Merveilles de la Science, published 1870.

Photo credit
Bridgeman Images
Image keywords
19th century / wood (material) / material / standing / physics / mathematics / knobs / scientific / conducting / scientist / science / electrostatic / pointed / investigating / research / effects / historical / platform / professor / mounted / discharges / charge / electrical / generator / insulating / electricity / piece / discharge / point / positive / showed / jean jallabert / deflection / wax / points / touching / holding / negative / history / pivot / jean / illustration / jallabert

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Largest available format 4827 × 3709 px 12 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 4827 × 3709 px 409 × 314 mm 12.4 MB
Medium 1024 × 787 px 87 × 67 mm 1.3 MB

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