1 Inch Cover.

2 inch Cover.

Sizes of Slates.

No. of Slates to the Square or 100 Poet.

No.of Slates or 100 Feet.

24 by 16

86

84

24 by 14

98

93½

24 by 12

114

109

22 by 14

108

102¼

22 by 12

126

120

22 by 10

152

144

20 by 14

129

114¼

20 by 12

143

133 1/3

20 by 11

146

145½

20 by 10

169¼

160

18 by 12

160

150

3 Inch Cover.

2 Inch Com.

Sizes of Slates.

No. of Slates to the Square or 100 Feet.

No. of Slates to the square or 100 Feet.

18 by 11

174¼

1031

18 by 10

192

180

18 by 9

213

200

10 by 12

184

171 ½

16 by 10

221½

205¾

16 by 9

246

228½

16] by 8

277

267

14 by 10

262

240

14 by 9

293

266½

14 by 8

827

300

14 by 7

874

343

"Each Slate is 3 inches bond or cover. The rule for measuring Slating is, to add one foot for all hips and valleys. No deduction is made for Lutheran windows, sky-lights or chimneys, except they are of unusual size; then one-half is deducted."

Imported Slates.

Names of Slates.

Sizes.

Number of Superficial Feet each M of1200 will cover.

Weight of each

M of 1200

Slates.

Inches. Inches.

Duchesses..........................

24 by 12

1100

60 cwt.

Marchionesses...............

22 " 12

1000

66 "

Countesses...............

20 " 10

750

40 "

Viscountesses...............

18 " 10

666 2/3

86 "

Ladies...............

16 " 10

583 1/3

31 "

" ...............

16 " 8

466 2/3

25 "

" ...............

14 " 8

400

22 "

" ...............

12 " 8

333 1/3

18½ "

Plantations ............

14 " 12

600

33 "

" ...............

13 " 10

458 1/3

25 "

" ...............

12 " 10

416 2/3

23 "

Doubles........................

13 " 7

320 5/6

17½ "

" small...............

11 " 7

262½

14½ "

School Slates for

Blackboards.............

5 ft. by 2½ ft. 5 feet by 3 ft.

78 plasterers' and pavers' work, measurement of plasterers' work.

Plasterers' work is of two kinds, namely, ceiling - which is plastering upon laths - and rendering, which is plastering upon walls, which are measured separately.

The contents are estimated either by the foot or yard, or square of 100 feet. Enriched mouldings, etc., are rated by running or lineal measure. One foot extra is allowed for each mitre.

One-half of the openings, windows, doors, etc., allowed to compensate for trouble of finishing returns at top and sides.

Cornices and mouldings, if 12 inches or more in girt, are sometimes estimated by the square foot; if less than 12 inches, they are usually measured by the lineal foot.

1 bushel of cement will cover 1 1/7 square yards at 1 inch in thickness.

1 bushel of cement will cover 1} square yards at ¾ths of an inch in thickness.

1 bushel of cement will cover 2¼ square yards at ½ of an inch in thickness.

1 bushel of cement and 1 of sand will cover 2\ square yards at 1 inch in thickness.

1 bushel of cement and 1 of sand will cover 3 square yards at ¾ths of an inch in thickness.

1 bushel of cement and 1 of sand will cover 4½ square yards at ½ of an inch in thickness.

1 bushel of cement and 2 of sand will cover 3 1/3 square yards at 1 inch in thickness.

1 bushel of cement and 2 of sand will cover 4½ square yards at ¾ths of an inch in thickness.

1 bushel of cement and 2 of sand will cover 0} square yards at ½ of an inch in thickness.

1 cwt. of mastic and 1 gallon of oil will cover 1½ yards at ¾, or 2½ at ½ inch.

1 cubic yard of lime, 2 yards of road or drift sand, and 3 bushels-Is of hair, will cover 75 yards of render and set on brick, and 70 yards on lath, or Go yards plaster, or render, 2 coats and set on brick, and 60 yards on lath; floated work will require about the same as 2 coats and set.

Laths are 1¼ to 1½ inches by 4 feet in length, and are usually set ¼th of an inch apart. A bundle contains 100. 1 bundle of laths and 500 nails cover about 4 ½ yards.