bien, rightly,fully

3. Ohm (Georg Simon, 1787-1854), celebrated German physicist, who became professor of expérimental physics at the University of Munich in 1849. What is known in electricity as "Ohm's law," is that the current is equal to the voltage (electro-motive force) divided by the résistance.

4. Pouillet (1791-1868), French physicist, appointed to the chair of physics at the Sorbonne (University of Paris) in 1838.

Page 175. — i. bouteille de Leyde; cf. page 169, note 1.

Page 176. — i. je ne sais quelle, some sort of.

Page 17 7. — i. il ne faut pas oublier, it must not be forgotten. 2. de façon à, so as to.

Page 178. — i. rapprochés, close together.