294 Proceedings of Societies. 
the hollow rope form which is used for blasting. Its power in splitting 
up material is exerted exactly as you wish. With regard to the mili- 
tary and submarine explosion, it is a well-known fact that a bag of gun- 
powder nailed on the gates of a city will blow them open. A bag of 
cotton exploded in the same way produces no effect. To blow up the gates 
of a city with gun-cotton, it must be confined before explosion. Twenty 
pounds of gun-cotton carried in the hands of a single man would be suffi- 
cient, only he must know its value. 
“ On Chemical Manufactures on the Tyne.” By Mr J. C. Stevenson. 
—The manufactures included Salt, Soda Ash, Caustic Soda, eypesul- 
phite of Soda, Manganese, French ‘Limestone, Bleaching Powder, $ Soap, 
Prussiate of Potash, Alum, Epsom Salts, Carbonate of Magnesia, Super- 
phosphate of Lime, Pearl Hardening, Sulphate of Iron, Venetian Red, 
Sulphate of Copper, Resin Size, Lamp Black, Grease. 
QUANTITIES AND PRICES.—RAW MATERIALS. 
Tons. Price. Value. 
Sulphur (included as Pyrites)... 72,800 £0 10 0 £169,200 0 0 
(Copper value not included. ) 
Salt, : F . 90,000 015 0 67,500 0 0 
Nitrate of soda, t ; 4, B00 1415 0 36,875 0 0 
Chalk, . : : ; ‘ 144.000 Oa. ar AG 18,000 0 0 
onl an ‘ : : . 823,000 a I”. 60,562 10 0 
Manganese, s : . 11,400 40 0 45,600 0 0 
Rough Epsom salt, . : L0G 2 DD 3,375 0 0 
Magnesian limestone, ; : 700 0 3-5 122 10 0 
French limestone, . 3 . 14,000 0 4 6 3,150 0 0 
Resin, . ; ; : BRT ee i Le eames, ee a a 
Tallow, . f ; : bey -panmnive Be in BS Be 
FINISHED PRODUCTS. 
Alkali, . : PF . 43,500 £3-10 ~0 £369,750 0 O 
Irystals of soda, : ; . 61,800 415 0 243,675 0 0 
Bi-carbonate of soda, : . 7,450 12) 8 2@ 89,400 0 0O 
Caustic soda, . , 7 580 18 0 0 10,410 0 0O 
Hyposulphite of soda, : : 400 25 0 0 10,000 0 0 
Oil of vitriol, . : Sok Daten, ae 6-70, 0 38,640 0 0 
Epsom salts, . : «41,660 i »- 0 10,870 0 0 
Hydrochloric acid, : £80,000.) | hy.) pt. ea bois i 
Sulphuric acid, used in the 
eet of soda, . 86, E 20h eke 2) a a 
Bleaching powder, . : . 2£1;200 ae 100,800 0 O 
Soap, : : . 6,000 34 0 0 204,000 0 0 
Yellow prussiate of potash, ; 105 0 1 08 Tb. } Digs oe 
Red ditto, : ; : F 40 0 2°6R@lb. (IL 20070 0 
Alum, . . 4,000 be ee 28,000 0 0 
Carbonate of magnesia, ‘ ; ey) ote NN ees 7,500 0 0 
Superphosphate of lime, . . 15,000 elo Pf 75,000 0 O 
Pearl hardening, . ; . 2,000 10: 3G: 0 20,000 0 0 
Sulphate of iron, . F , 2,000 eB 6,000 0 O 
Venetian red, . : / . 4,000 5 0 0 20,000 0 O 
Sulphate of copper, . ; : 100 35 0 0 8,500 0 0 
Resin size, . : : ; 100 70.0 700 0 0 
Lamp black, . : : . 42,200 he ee 8,400 0 0 
Grease, . F ' ; . 2,800 B,D. 2 22,400 0 O 
Cements, , é . . 12,000 2.0: 0 24,000 0 0 
“On Fractional Distillation.” By Professor WANKLYN. 
