| Nitroglycerine | 10 |
| Ammonium nitrate | 58 |
| Wheat flour | 20 |
| Sodium chloride | 12 |
Limit charge | 36 oz. |
| Power (swing of ballistic pendulum) | 2.54” |
SEBOMITE is a French chlorate explosive resembling [Cheddite], but containing tallow instead of castor oil.
SECURITE was one of the first coal-mine explosives. It contained ammonium nitrate and dinitro-benzene, and was therefore similar to [Bellite] and [Roburite].
SECUROPHORE.—A Belgian coal-mine explosive containing nitroglycerine, nitrates, flour and other constituents.
SENGITE is a variety of [Tonite] introduced in South Africa as a substitute for [Gelignite] in consequence of the scarcity of glycerine due to the War. It contains guncotton and sodium nitrate, and sufficient moisture to render it safe to handle without diminishing its strength. The first four letters of its name stand for substitute explosive no glycerine. It requires a priming cartridge of [gelignite] or similar explosive. It is more expensive than gelignite, and consequently is not likely to be used when the scarcity of glycerine has been relieved.
SHELLITE.—A high explosive consisting of picric acid and dinitro-phenol, used for filling shells. The mixture possesses the advantage over straight picric acid that it melts at a lower temperature. It was for a time called [Picrol].
SHEPPEY POWDER.—A coal-mine explosive made by the Cotton Powder Co. which was on the Permitted List for a short time, but was removed in 1914—
| Date of Permit | 25-11-13 |
| Nitroglycerine | 27 |
| Potassium nitrate | 31 |
| Wood meal | 36 |
| Ammonium oxalate | 6 |
Limit charge | 10 oz. |
| Power (swing of ballistic pendulum) | 2·10” |
SIEGENIT.—A German blasting explosive containing ammonium nitrate, flour, and not more than 15 per cent. of dinitro-toluene. For use in coal mines, sodium chloride and magnesium sulphate are added as diluents, and nitroglycerine to increase the sensitiveness.
SILESIA is a German blasting explosive consisting of potassium chlorate, the particles of which are coated with resin or oxidised resin. The latter is made by treating ground colophony, mixed with 10 per cent. of starch, with nitric acid. After washing and drying this is incorporated with the chlorate with the aid of alcohol, in which it is soluble. For use in coal mines sodium chloride is sometimes added. The following are examples—