... The form ofbattery now most universally employed for electrotype, and othergalvanic purposes, is Smee's--Fig... 
Henry H. Snelling 「The History and Practice of the Art of Photography」
...In this point, manywho have tried the electrotype process have failed, attributing their illsuccess to other than the proper cause...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...“The great difficulty in taking an electrotype impression, and preservingthe original, has been attributed to the battery being too powerful...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
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