The table below gives the consumption of gas in the different varieties of Bray's flat-flame burners in ordinary use, under a pressure of ten-tenths, or lin. With regard to the apparent inconsistency of some of the figures, these are based on tests made at the instance of the Leeds Corporation.

No. of Burner.

Bray's Regulator Union Jet.

Bray's

Special

Union Jet.

Bray's Regulator

Slit Union.

Bray's

Special

Slit Union.

Bray's Regulator Batswing.

Bray's Special Batswing.

Cub. ft.

per hour.

Cub.ft per hour.

Cub. ft.

per hour.

Cab.ft.

per hour.

Cub.ft per hour.

Cub. ft. per hour.

0

3.6

3.05

__

__

-

_

1

3.9

4.02

4.8

3.53

4.26

3.86

2

4.9

3.97

5.2

4'22

4.95

4.46

3

4.8

4.90

6.37

4.6l

5.64

5.25

4

6.67

5.15

5.88

5.69

6.74

5.55

5

7.97

6.67

8.14

6.37

6.93

5.85

6

835

7'65

8.60

7.55

8.82

7.53

7

8.65

8.05

9.04

8.60

10.00

8.72

8

10.60

10.00

9.40

10.00

9.30

9.30

9

-

11.20

10.50

12.60

10.00

931

The ordinary Welsbach incandescent burners are of three types. First,the " C "burner, consuming about 31 cub. ft. of gas per hoar, and giving a sixty candle-power light; second, the " S," consuming 2k cub. ft. of gas, and giving a light of thirty-five candles; and third, the "Gem burner, consuming 1 3/4 cub. ft. of gas, and yielding a light of thirty-five candle-power. The " New" Welsbach burner is made in the following sizes: -

No. of Burner.

Gas Consumption at 1 in. pressure. Cubic feet.

Candle-power

(about)

0

3/4

20

1

1

30

2

22

50

3

3

80

4

3.8

105

7

6.5

185