Before the year 1839 a duty was paid upon bricks; their size was then practically fixed by Act of Parliament, and it has since remained materially unaltered.

Ordinary bricks in the neighbourhood of London are about 83/4 inches long, 41/4 wide, and 21/2 inches thick, and weigh about 7 lbs. each.

In different parts of the country the size and weight vary slightly; in the north of England and in Scotland they are larger and heavier. (See p. 112.)

A very large brick is inconvenient for an ordinary man to grasp, and a heavy brick fatigues the bricklayer, who has to lift it when wet and lay it with one hand.

In order to obtain good brickwork it is important that the length of each brick should just exceed twice its breadth by the thickness of a mortar joint.

The following Table gives the Size and Weight of some of the best known varieties of Bricks in this country. See also Tables, pages 114, 115.

Size in Inches.

Weight. Lbs.

Weight

PER 1000 IN

Cwts.

London Stock

8 3/4

4 1/4

2 3/4

6.81

60 3/4

Red Kiln ....

8 3/4

4 1/4

2 3/4

7.0

63

Fareham Reds

8.5

4.15

2.6

6.3

56.2 G

Do. Rubbers .

10.9

4.8

2.9

8.8

78.5 G

Catty Brook Pressed Brick (near Bristol) '

9 1/4

4

3

9.5

85

Bridgewater Red Brick

8.75

4.3

2.75

Lancashire Red Pressed Facing Brick

9

4 1/2

3

8.9

80

Pressed Brick from Leeds .

9.5

4.5

3.5

10

89

Scotch Brick from Sandyfauld, near Glasgow

9.5

4.5

3.5

9.7

86.6

Bricks made from Blaize near Glasgow

9

4.3

3.4

8.6

77

Scotch Brick from Elgin (used for partitions)

12

6

3

Irish Brick from Athy

8.

3 3/4

2 3/4

Burham Wire Cut .

8.6

4.0

2.6

5.4

58.2 G

Do. Pressed .

8.75

4.2

27

6.1

54.5 G

Suffolk Brimstone .

9

4.6

2.6

6.8

60.7 G

Do. White

9.2

4.3

2.6

6.3

56.2 G

Staffordshire thin Paving

9

4 1/2

3

8.9

80

Do.

9

4 1/2

2

6.1

55

Staffordshire Brick-on-edge, for edge paving

9

3

3 1/2

7.8

70

Tipton Blue

9

4 1/2

3

10

89

Adamantine Clinker

6

2 1/2

13/4

2

18

Dutch Clinker

6 1/4

3

1 1/2

1.55

14

The Figures marked G are from Grant's Experiments, Proceedings Inst. Civ. Engineers, vol. xxv. p. 35.