Each style of battery has certain fields of its own to fill but it becomes sometimes necessary for the owner of a gasoline engine to decide which he shall use, says "The Canadian Thresherman." In favor of the dry battery is the low cost, and the fact that there is no solution to spill around, and the weight is light compared to the wet cells. The objection to them is that they cannot be used on long runs without weakening, and then have to stand over night to recuperate.

The proper way to use them is to have two sets, making a double battery, and have them connected to a double throw switch. This enables you to run a few hours on one set and then throw in the other set and while it is being used the first set is regaining its strength. With a wet battery this is not necessary as they will continue to give a steady, equal spark until they give out almost at once. On account of this fact it is not necessary to use a double battery with them. Wet battery manufacturers can supply a special style that is liquid tight, but any of the ordinary types can be made so by wrapping the joint of the cover with common electric tape.

Liquid tight cells are required for engines that are moved around so that the jarring and shaking will not spill the liquid. In our opinion the best method of ignition is to use a battery for starting the engine and by means of a double throw switch, throwing from the battery to an automatic sparking dynamo, after the engine is up to speed. As made now, the high grade dyramos give good results and are to be depended upon for a good hot spark that will ignite charges, that the battery will sometimes fail to do. The ignition part of an engine is of the utmost importance, and must get frequent attention and care to get good results from it.