The Dental cosmos . ID GRAVITY BATTERY FOB THE BONWILL ELECTRO-MAGNETIC DENTAL MALLET. The Partz Acid GravityBattery is offered as thebest for running the electro-magnetic mallet. The cellsare of the Bunsen type, withthe gravity principle appliedto them. The advantages claimedare that the cells do not needto be emptied oftener thanonce in two or three months,and meanwhile their fullstrength may be maintainedby supplying them fromtime to time with sulpho-chromic salt, a product inwhich sulphuric acid hasbeen caused to combine withchromic acid in an amorpho- — — . - - crystalline state. The zinc
The Dental cosmos . ID GRAVITY BATTERY FOB THE BONWILL ELECTRO-MAGNETIC DENTAL MALLET. The Partz Acid GravityBattery is offered as thebest for running the electro-magnetic mallet. The cellsare of the Bunsen type, withthe gravity principle appliedto them. The advantages claimedare that the cells do not needto be emptied oftener thanonce in two or three months,and meanwhile their fullstrength may be maintainedby supplying them fromtime to time with sulpho-chromic salt, a product inwhich sulphuric acid hasbeen caused to combine withchromic acid in an amorpho- — — . - - crystalline state. The zincs suffer so little from local ac-tion that they may always be left immersed, unless the apparatus is not to beused for weeks or months, when they may be raised and suspended over theliquid, for which purpose their stems are provided with holes for the insertionof pins above the covers. There is no forming of chrome alum so long as thesulpho-chromic salt is not supplied greatly in excess of the quantity
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdentist, bookyear1890
