xxxu 



LIST OF ILLUSTRATIONS ON WOOD. 



FIO. 



461. Roseleur's balance for gold and silver electro-plating 714 



462. Artistic furniture ornamented with incrustations obtained by electro- 



plating . . . ... ... . .".. 716 



463. Workshop for copper electro-plating in Oudry's manufactory ..... 718 



464. Elements of Pulvermacher's battery or chain 720 



465. Pulvermacher's galvanic chain in use 720 



466. RuhmkorfF s electro-medical induction apparatus 721 



467. Secchi's meteorograph ... . . . ....... 725 



