NOTES. 163 



XLIII. L'liLECTRICITE INDUSTRIELLE. 



1. Coulomb is the unit of a circuit of one ampere passing a given 

 point in one second. Charles Coulomb (1736-1806), a distinguished 

 French natural philosopher, was born at Angouleme. 



2. nous aurons a faire intervenir : we shall have to take into con- 

 sideration. 



3. watt is the unit of energy. When the number of volts is multi- 

 plied by the number of amperes one gets the energy in watts ; 746 

 watts represent one horse-power. James Watt (1736-1819), the inven- 

 tor of the modern condensing steam-engine, was born at Greenock on 

 the 1 9th of January, 1736. 



4. Joules : named after James Prescott Joule, an English physicist, 

 born at Salford on the 24th of December, 1818. 



XLIV. L'IlLECTRICIT DANS LA MAISON. 



1. n 08 : numeros. 



2. serre d'appartement : conservatory (fit., house-conservatory). 



3. o fr. 0015, read : quinze dix-milliemes de franc. 



4. cylindres en poterie concentriques : concentric cylinders of 

 pottery. 



5. en t61e de fer (emboutie) : formed of sheet-iron (hollowed out). 



6. mlnage'e : maintained. 



7. puissance utile maxima : the maximum effective power. 



8. manoeuvre: device. 



9. la vue en plan et en coupe : a general view and a section. 



ofr. 7oxi6 = ofr>014> 



800 



read: 70 centimes multiplie par seize, divise par 800, est egal a 

 quatorze milliemes de franc, 

 n. resistances: resistances. 



12. fils d'amene'e : heating wires. 



13. Cristal Palace: Crystal Palace, the large building composed 

 chiefly of glass and iron, erected in Hyde Park, London, for the uni- 

 versal exhibition of 1851, and subsequently reerected at Sydenham, near 

 London, as a permanent institution for public instruction and enter- 

 tainment. 



14. faire une conference : to give a lecture. 



1 5. tarif de vente : price. 



16. prises de courant : translating devices. 



