Part 5 - Hand and Rifle Grenades; Chapter 4: Signal and Illuminating Rifle Grenade Nos. 57, 58, 59, 60, 61, and 62 (Obsolescent)Part 5 - Hand and Rifle Grenades; Chapter 4: 1¼-lb. Incendiary Bomb Mk I (Obsolescent)
BRITISH EXPLOSIVE ORDNANCE
Part 5 - Chapter 4
Smoke, Illuminating, and Incendiary Grenades

Incendiary Hand or Rifle Grenade No. 76 Mk I (Obsolete)
Data

Total weight

 19 oz.

Filling

 128 cc phosphorus mixture (75% phosphorus and 25% sul-phide of phosphorus) 21 cc water, 110 cc benzine, and a stick of crude rubber 3½ in. long and ¼ in. in diameter

Markings

 Red caps indicate suitability for hand throwing only; green caps indicate suitability for hand throwing or projecting

Description: This grenade consists of a short-necked, ½ pint glass bottle containing an incendiary filling, and closed by a crown cap. Ten per cent free space is left above the filling for expansion. During storage, the strip of crude rubber dissolves and increases the viscosity of the liquid.

Operations: The grenade must be thrown or projected with enough force to break on impact. When broken, the phosphorus mixture ignites on contact with the air, thus set-ting the benzine alight. The grenade is designed to be thrown against armored-force ve-hilces to produce an incendiary and smoke effect.

Remarks: The grenade should not be shaken before throwing, as agitiaion causes the formation of an emulsion in which the droplets of phosphorus are protected from the air by a covering of water.

Figure 251 – Incendiary Hand or Rifle Grenade No. 76 Mk I

Part 5 - Hand and Rifle Grenades; Chapter 4: Signal and Illuminating Rifle Grenade Nos. 57, 58, 59, 60, 61, and 62 (Obsolescent)Part 5 - Hand and Rifle Grenades; Chapter 4: 1¼-lb. Incendiary Bomb Mk I (Obsolescent)