=SUPER-EXCELLITE= is a modification of this, containing salts as cooling agents. Three formulæ passed the Rotherham Test-- No. 2. No. 3. _Date of Permit_ 1-9-13 7-4-14 22-6-14 Nitroglycerine 4 5 9·5 Collodion cotton -- -- 0·5 Ammonium nitrate 75·5 50 59 Potassium nitrate 7 20 -- Starch 3·5 5 4·5 Castor oil -- -- 1 Ammonium chloride -- 5 -- Sodium chloride -- -- 15 Ammonium oxalate 10 15 10·5 Limit charge 10 14 36 oz. Power (swing of ballistic pendulum) 2·74 2·72 2·73” It will be seen that all three are about equal as regards power, but that No. 3, which contains the largest proportion of cooling agents and more nitroglycerine, can be used safely in much greater charges. In 1916 807,000 lbs. of No. 3 were used in mines and quarries, principally in coal mines. It is recommended by the makers, Curtis’s and Harvey, for hard coal and colliery work generally. The permits of the others have been repealed. =EXPEDITE= is a coal-mine explosive on the Permitted List made by Explosives and Chemical Products, Ltd.-- _Date of Permit_ 25-11-13 Ammonium nitrate 35 Potassium nitrate 33 Trinitro-toluene 12 Ammonium chloride 20 Limit charge more than 32 oz. Power (swing of ballistic pendulum) 2·62” See also =XPDITE=. =EXPLOSIFS N=, =O=, etc. See under respective letters. =EXTRA DYNAMITE= is a variety of American dynamite containing ammonium nitrate. =FAVERSHAM POWDER= is a coal-mine explosive of the Grisounite type made by the Cotton Powder Co. The mixture, which was on the old Permitted List, had the composition-- Ammonium nitrate 90 Trinitro-toluene 10 To make it pass the Rotherham Test, part of the ammonium nitrate was replaced by potassium nitrate, and ammonium chloride was added-- No. 2. _Date of Permit_ 10-2-14 Ammonium nitrate 47·5 Potassium nitrate 24 Ammonium chloride 18·5 Trinitro-toluene 10 Limit charge 24 oz. Power (swing of ballistic pendulum) 2·61” but this also has now been repealed.