The large production of military pyrotechnics required correspondingly large storage facilities, which prompted the Ordnance Department to request a report.

In December, 1918, the following report was drawn up, based upon the best information obtainable at that time. This report covers merely the essential points as to the storage of pyrotechnic articles, with a short statement in reference to the dangerous factors, where such exist, occurring in the various compositions.

Considerable study could well be undertaken on this subject as it is one concerning which only experience can give us definite information. Such experience as the manufacturers of fireworks have had is indicative, but by no-means conclusive.

The following list of representative formulas used in compositions covers a wide range, and may be used for the purpose of comparison with other formulas of a similar nature, with regard to their fire and explosion hazard.

Representative Formulas Used In Compositions

No. 1. - Rocket-driving, fuse, signal-expelling charge, and meal-powder composition -

Per cent.

Saltpeter (KNO2)............

56.0

Sulphur (flour)..................

12.2

Charcoal (No. 10 - No. 20 - 10XX) ...............

31. 8

(D. C. XX - No. 20 coarse - No. 36 coarse.)

No. 2. - Rocket smoke-signal and rocket smoke-tracer composition -

Per cent.

Saltpeter (KNO2)

37.2

Sulphur (flour).................

25.6

Arsenic disulphide (realgar; As2S2)

37.2

No. 3. - Rocket white-signal composition -

Percent.

Barium nitrate (Ba(NO3)2)................

71.4

Aluminum powder ................

10.7

Aluminum flake or bronze................

7.2

Sulphur (flour)...................

10.7

No. 4. - Rocket red-signal composition -

Per cent

Strontium nitrate (Sr(NO3)2)

66.6

Potassium chlorate (KC103)

25.0

Orange shellac (powdered)

8.4

No. 5. - Rocket green-signal composition -

Percent.

Barium chlorate (Ba(ClO3)2, 2H2O)

55.5

Barium nitrate (Ba(NO3)2)

33.3

Orange shellac (powdered)

11.2

No. 6. - White rifle-light and white Very-light composi tion -

Per cent.

Barium nitrate (Ba(NO3)2)

70.6

Aluminum, powder .................

19.6

Aluminum flake or bronze...........

9.8

No. 7. - Red rifle-light and red Very-light composition:

Per cent

Potassium chlorate (KClO3)...............

72.7

Strontium carbonate (SrCO3)..............

15.2

Orange shellac (powdered)................

12.1

No. 8. - Green rifle-light and green Very-light composition -

Per cent.

Barium chlorate (Ba(C103)2, 2Ha2O)...............

90.0

Orange shellac (powdered) .........

10.0

No. 9. - White position-light composition -

Per cent.

Barium nitrate (Ba(NO3)2.............................

69.8

Sulphur (flour) ..................

16.3

Aluminum flake or bronze...................

13.0

Antimony sulphide (Sb2S3)

.6

Stearin ..................

.3

No. 10. - Red position-light composition -

Per cent

Potassium chlorate (KCIO3)________________

37.5

Strontium nitrate (Sr(NO3)2)

50.0

Orange shellac (powdered).................

12.5

No. 11. - Green position-light composition -

Percent.

Barium chlorate (BatClO3)2 2H2O)...........

23.2

Barium nitrate (Ba(NO3)2)..............

50.0

Potassium chlorate (KClO2)

6.3

Orange shellac (powdered).....................

10.5

Stearin ..................

1.0

No. 12. - Position-lights first fire -

Percent.

Saltpeter (KNO2)...............

56.5

Arsenic disulphide (AS2S2, realgar)...................

9.4

Antimony sulphide (Sb2S2)

9.4

Sulphur (flour). ................

18.8

Dextrin.................

5.9

No. 13. - Aeroplane-flare and white wing-tip-flare composition -

Per cent.

Barium nitrate (Ba(NO3)2)

76.0

Aluminum flake or bronze..................

9.9

Aluminum powder................

8.1

Sulphur (flour)...............

4.0

Castor oil, AA....................

2.0

No. 14 - Aeroplane-flare first fire -

Per cent.

Barium nitrate (Ba(NO2)2).................

44.5

Saltpeter (KNO2)....................

33.3

Orange shellac (powdered)...................

11.1

Sulphur (flour).......................

11.1

No. 15. - Wing-tip flare (red tinge) -

Per cent.

Strontium nitrate (Sr(NO3)2).....................

66.6

Sulphur (flour)...................

16.7

Aluminum powder...................

16.7

Add sufficient liquid orange shellac to make adhesive.

No. 16. - Smoke torch -

Per cent.

Saltpeter (KNO2)..............

47.4

Pitch (medium or soft, low melting point, Black Diamond roofing)................

29.2

Borax (Na2B4O71OH2O)

10.6

Chalk (CaCO3)................

4.9

Sand (SiO2)

4.0

Sulphur (flour)................

3.9

No. 17. - Smoke-torch firs fire -

Per cent.

Saltpeter (KNO3)................

63.0

Sulphur (flour) ....................

15.8

Antimony sulphide (Sb2S3)...............

10.6

Meal powder (see formula No. 1 above)................

10.6

No. 18. - Smoke-torch blob -

Per cent.

Potassium chlorate (KC1O3)..............

88.9

Red gum (gum Kauri).............

7.4

Charcoal (fine).................

3.7

No. 19. - Smoke-torch striker -

Red phosphorous. Charcoal (fine).

No. 20. - Prime composition -

Per cent.

Meal powder (see formula No. 1 above).............

97.0

Orange shellac (powdered)....................

3.0

No. 21. - Detonating caps: Formula not specified.

No. 22. - Matches: Formula not specified.

No. 23. - Rifle smokeless powder: Formula not specified.