ADDENDUM.
The Gassner Battery.
Since the compilation of the foregoing pages, a dry battery, known by the above name, has found great favour with electric-bell fitters. Its peculiarity consists in the zinc element forming the outside cell. In this is placed the carbon, which is separated from the zinc by a thick paste or jelly made of gypsum and oxide of zinc. The cell can be placed in any position, works as well on its side as upright, is not subject to creeping, has an E.M.F. of about 1·5 volt, with an internal resistance of only 0·25 ohm in the round form, and 0·6 in the flat form. The Gassner dry battery polarizes much less quickly than the ordinary Leclanché. The only defects at present noticeable, are the flimsy connections, and the fact that the outer cases being metal must be carefully guarded from touching one another. This can be effected by enclosing in a partitioned wooden box.
INDEX.
A.
- Acid, Chromic, [33], [46]
- Hydrobromic, [20]
- Hydrochloric, [20]
- Hydriodic, [20]
- Nitric, [20]
- Sulphuric, [20]
- Action in Bichromate, [47]
- Dotting, [116]
- of electric bell, [81]
- Leclanché, [35]
- Relay, [134]
- Rubbing, [116]
- of zinc on acids, [21]
- Agglomerate block, [38]
- Cell, [38]
- Compo, [38]
- Alarms, Burglar, [113]
- Fire, [123]
- Frost, [121]
- Thermometer, [122]
- Thief, [113]
- Watch, [124]
- Amber, [1]
- Ampère, [55]
- Ampère's law, [11]
- Annealing iron, [13]
- Arrangement of bells for lifts, [171]
- Ships, [170]
- Attraction, [3]
B.
- Batteries, [18]
- Battery agglomerate, [39]
- Battery, Bichromate, [48]
- Bunsen, [33]
- Chromic acid, [46]
- Daniell's, [29]
- Gassner (addendum), [186]
- Gent's, [44]
- Gravity, [31]
- Modified, [120]
- Grenet, [46]
- Grove, [33]
- Judson's, [41]
- Leclanché, [33]
- Reversed, [46]
- Minotto, [31]
- Smee's, [27]
- Walker's, [27]
- Bell action, case for, [88]
- Blocks, wooden, [150]
- Bobbins, electric bell, [67]
- Box for batteries, [43]
- Brushes, dynamo, [17]