Fire Grenades: Salt and Sal Ammoniac Solution in Thin Glass Bottles (Boy Mechanic, 1913)

The old 'fire grenade': a strong solution of common salt and sal ammoniac sealed in thin quart bottles, thrown into the flames to break and drench them. A historical method; keep a modern rated extinguisher as well.

初心者

An hour

手順

His batch

Jupyter ノートブックを読み込み中…

Read the Boy Mechanic

"Dissolve 20 lb. of common salt and 10 lb. of sal ammoniac in 7 gal. of water."

Make the solution

Dissolve 20 lb (9.1 kg) of common salt and 10 lb (4.5 kg) of sal ammoniac (ammonium chloride) in 7 gal (26.5 l) of water.

このステップの材料:

塩1 個

塩化アンモニウム（NH₄Cl）1 個

水1 個

必要な工具:

20 リットルのバケツ

Fill the bottles

Fill thin glass bottles of about a quart, cork them tightly and seal the corks so nothing evaporates.

このステップの材料:

ガラス瓶（無色透明）1 個

コルク栓1 個

蜜蝋1 個

Use

At a fire, throw a bottle into or near the flames so it breaks, or break off the neck and scatter the liquid on the fire. Several may be needed.

Troubleshooting

Fire grenade troubleshooting.

Flow

History and honest limits

From **The Boy Mechanic, Book 1** (Popular Mechanics, 1913), p. 351 (checked on the archive.org scan boymechanic0000unse_n5a8). This is the period method as printed; it is not tested to any modern fire rating. Metric figures and wax sealing are ours.