CHAPTER XIV

. INSTRUMENTS FOR INVESTIGATING ATMOSPHERIC ELECTRICITY.

131. ATMOSPHERIC ELECTROSCOPE.

132. VOLTA'S ELECTROMETER.

133. PELTIER'S ELECTROMETER.

134. BOHNENBERGER'S ELECTROSCOPE.

135. THOMSON'S ELECTROMETER.

136. Fundamental Facts.

137. Lightning Conductors.

138. Precautions against Lightning.

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