US$ 45.76
The representative of the country's farmers
can be seen here setting his sights on the stag in the distance
is on the left
15th February 1974
Electrical discharge mb-code 1193582 The representative of the country'sStudy of patterns produced by electrical discharges on surfaces revealed by dusting with powdered red lead and sulphur. Sometimes termed 'Lichtenberg figures'. These experiments were conducted at Cragside in Northumberland, England, using a Wimshurst machine (electrostatic generator) and two 10 gallon Leiden jars. Current was conveyed to two rod conductors with a spark gap at which coated wires discs or plates were positioned. Lord Armstrong exhibited