OF WORKING CYLINDRICAL RETORTS.

87

Hence the amount of expenditure for procuring857,667 cubic feet of gas, is i;360. 17s.

The value of the saleable products =£846. 10s.

6d.

And the average proportion of gas obtainedfrom one chaldron of Newcastle coal, 8,300 cubicfeet.

Process B.

Number ofDays theRetortswereworked.

° W S

III

Is*

sz —

Quantity of Coaldecomposed forobtaining Gas.

Quantity ofCoal used forFuel.

Quantity ofGas

produced.

Proportion

ot Gasto a

Chaldronof Coals .

Chaldron.Bushel.

Chaldron.Busk.

Cubic Feet.

Cubic Feet.

Monday -

57

9 —

18

2

— 13

94,987

10,000

Tuesday -

77

12 —

31

3

— 8

128,597

10,000

Wednesday

73

12 —

8

3

— 2

122,188

10,000

Thursday

79

13 —

4

3

— 10

131,176

10,000

Friday —

76

12 —

27

3

— 7

127,696

10,000

Saturday -

77

12 —

27

3

— 6

127,536

10,000

Sunday- -

75

12 —

20

3

— 6

125,487

10,000

85 —

27

2!

— 16

857,667

10,000*

Average proportion of gas from a chaldron of coal.