Battery

(bat'-er-e). A series of two or more pieces of apparatus arranged to produce increased or multiple effect, as battery of boilers, prisms, lenses, galvanic cells. Usually applied to a series of cells producing electricity (voltaic or galvanic battery); also, frequently to a single cell. B., Primary, the combination of a number of primary cells so as to form a single battery. B., Secondary, the combination of a number of storage cells to form a single electric source. The following table shows the materials used in the more important batteries, and the electro-motive force (E. M. F.) in volts. Storage or secondary batteries are not included in the table. The common form of these is a series of lead plates carrying ma es of lead oxid. Grenet Cell for Therapeutic Apparatus. NAMES, ELEMENTS, FLUIDS, ETC., OF THE PRINCIPAL Name of Cell. Positive Element. Negative Element. Exciting Depolarizing Agent. Agent. E. M. F. in Volts. Bunsen. Zinc. Carbon. Sulphuric acid, dilute. Nitric acid. Beetz. Zinc. Copper. Zinc sulphate in plaster of Paris. Copper sulphate, in plaster of Paris. Callaud. Zinc. Copper. Solution Cupric sulphate. Daniel. Zinc. Copper. Zinc sulphate. phate. Edison-Lalande. Zinc. Cupric oxid and carbon. Pota ium hydroxid. Fuller. Zinc. Carbon. Zinc chlorid. Pota ium dichromate and hydrochloric acid. Zinc chlorid. Silver chlorid. 1.02 Sulphuric acid and pota ium dichromate. Chromic acid. 2.0 Sulphuric acid, dilute. Nitric acid. Gravity. See Call 1.75 075 to 1.96 1.0 to 1 14 of zinc sul- Cupric sulphate. Cupric oxid. aud. Gaiffe. Zinc. Silver. Grenet. Zinc. Carbon. Grove. Zinc. Platinum. Latimer Clark. Zinc. Mercury. Mercuric sulphate. Mercuric sulphate. Leclanche. Zinc. Carbon. Ammonium Manganese Lelande Zinc. Copper or iron. Pota ium hydroxid. Zinc scraps in a bath of mercury. Platinized carbon. Common Marie Davy. Zinc. Carbon. Sulphuric acid, dilute. Maynooth. Zinc. Iron. Sulphuric acid, dilute. Nitric acid (strong). Niaudet. Zinc. Carbon. Common Chlorated lime. Zinc. Carbon. Pota ium dichromate and sulphuric acid. Chromic acid. Zinc. Carbon. Mercurial solution. None separate.. Zinc. Silver. Pota ium hydroxid. Silver chlorid. Smee. Platinized silver. Sulphuric acid, dilute. None. Walker Zinc. Platinized carbon. Sulphuric acid, dilute. None. Zinc. Silver. Ammonium Silver chlorid. Chaperone. Maische. 1. to 1. 14 chlorid. salt solution. 1-25 1.94 to 1.97 1.436 0.98 1.42 dioxid. Cupric oxid.