=NAPHTHALIT.=--A German chlorate explosive introduced during the War. It contains not more than 80 per cent. of potassium chlorate, and aromatic hydrocarbons, such as naphthalene, and not more than 12 per cent. of nitro-hydrocarbons, but no trinitro-compounds; also paraffins, fatty oils, flour or other organic substance. It may contain also alkali chlorides, and not more than 4 per cent. of blasting gelatine. The prefixes Gesteins- and Wetter- are applied according as the explosive is intended for rock or coal mines. Grisou-=NAPHTALITE=. See =FAVIER= Explosives. =NATIONALITE.=--A coal-mine explosive of the Grisounite class made by the National Explosives Co., Ltd. The composition, which was on the old Permitted List, was-- Ammonium nitrate 92 Di- and Trinitro-toluene 8 But to pass the Rotherham Test it was necessary to add alkali chlorides. There were two formulæ formerly on the Permitted List-- No. 1. No. 2. _Date of Permit_ 22-6-14 28-1-15 Ammonium nitrate 65·5 64 Trinitro-toluene 15 15 Sodium chloride 19·5 -- Potassium chloride -- 21 Limit charge 12 20 oz. Power (swing of ballistic pendulum) 2·92 2·63” The permits have been repealed. =*N.C.T.= is the name given in the British service to the Nitro-Cellulose Tubular smokeless powder, made in the same way as the American service powder. It consists of nitro-cellulose completely soluble in ether-alcohol, but of comparatively high nitration. It is gelatinised with ether-alcohol and pressed into cords with either one or seven perforations running down them length-ways. These are cut into short cylinders and dried. The powder contains a little diphenylamine as a stabiliser. =N.E.= See New Explosives Company’s Smokeless Powder. =NEGRO POWDER.=--A coal-mine explosive of the Grisounite class made by Roburite and Ammonal, Ltd. The composition, which was on the old Permitted List, was-- Ammonium nitrate 88 Trinitro-toluene 10 Graphite 2 and a small quantity of colouring matter. To enable it to pass the Rotherham Test, sodium chloride has been added, and Negro Powder No. 2 is now on the Permitted List-- _Date of Permit_ 25-11-13 Ammonium nitrate 57 Trinitro-toluene 15 Graphite 0·7 Sodium chloride 27·3 Colouring matter small quantity Limit charge 20 oz. Power (swing of ballistic pendulum) 2·21” =NEONAL.=--A coal-mine explosive made by the New Explosives Company. Two formulæ were at one time on the Permitted List-- No. 1. _Date of Permit_ 1-9-13 22-6-14