374

IMPERIAL

i inch = 25.4 mm.

i foot = 30.480 cm.

i yard = 0.9144 m.

i furlong ss= 0.2011 kin.

i mile = 1.6093 km.

MODERN PAPER-MAKING

USEFUL EQUIVALENTS

METRIC

In. Ft.

i millimetre = 0.0393 = 0.0032

I centimetre = 0.3937 = 0.0328

i decimetre = 3.9370 = 0.3280

I metre = 39-3701 = 3.2808

i kilometre = 0.62137 ml. = 3280.8

i sq. in. = 6.4516 sq. cm.

r sq. ft. = 0.0929 sq. m.

i sq. yd. = 0.8361 sq. m.

i acre (4,840 sq. yd).=4046.87 sq. m.

i sq. mile = 259.000 hectares

I cu. in. = 16.3872 cm.3
r cu. ft. s= 0.0283 m.3
i cu. yd. = 0.7645 m.3

r pint = 0.5682 litre
i quart = 1.1364 litres
i gallon = 4.5459 litres (277.419 cu. in.)

i grain = 0.0648 gramme
i dram — 1.772 grammes
i oz. = 28.349 grammes
i Ib (7000 grains)=o.4536 kg.
i cwt. = 50.80 kg.
i ton = i.016 tonnes

i h.p. (33,000 ft.-lbs. per min.)

=745-9 joules per sec.
i ft-lb. (13,825.5 gm. cm.)

= i.3 562 joules
I h.p, hr. (1,980,000 ft.-lbs.)

= 2,685,443 joules
i watt-hr. (2654.31 ft.-lbs)

= 3600 joules per sec.

i sq. millimetre
i sq. centimetre
i sq. metre

i are
i hectare

r cu. centimetre
i cubic metre
(Stere)

r 0.0015 sq. in.

0.1550 sq. in.

: I-I959 sq« yd-

(10.7639 sq. ft.)
= 119.59 sq. yds.
s 2.471 acres

: 0.0610 cu. in.

= 35-3H5 CU. ft.

(1.3079 cu. yds.)

i cu. centimetre = 0.0338 fluid oz.

(0.2705 fluid dram)
i litre (1000 c.c.) = 0.220 gal.
i cu. metre (1000 litres) =220.083 gals.

i milligramme
i centigramme
I gramme
i kilogramme
I quintal
i tonne

= 0.0154 grain

= 0.1543 grain

= 15.4323 grains

= 2.2046 Ib.

= 1.9684 cwt.

= 2204.62 Ib. (0,9842 tons)

i joule = 0.7373 ft.-lb.

i joule per sec. (i watt)=0.0013 4 h.p.
i metric h.p, = 0.9863 h.p.
i metric h.p. hr. = 1,952,910 ft.-lb.
i calorie or heat unit = amount of heat required to raise the
temperature of I gramme of water i degree centigrade.

i Ib. per sq. in. = 0.0703 kg. per sq. cm.

I Ib. per sq. ft. = 4.882 kg. per sq. m.

i grain per gal. = 0.0142 gramme per litre

i Ib, per 1000 gals. = o.i kg. per m.3

i Imp. gal. = 277.419 cu. in.

i Imp. gal. = 0.1605 cu. ft.

i Imp. gal. = 1.2003 U.S. gals.

I cu. ft.= 6.2278 Imp. gals.

I cu. ft. = 62.2786 Ib.

i inch rainfall = 22,600 gals, per acre

I gal. per sq. ft.= 48.895 litres per sq. metre

I gal. per sq. ft. hr. = 1.17 cu. metres per sq. metre per day

i gal. per sq. ft. hr. = 1.92 vertical in. per hour

i gal. per sq. ft. hr. = 1,045,000 gals, per acre per day

1,000,000 gals, per acre per day = 0.96 gal. per sq. ft. per hour

1,000,000 gals, per acre per day = 1.84 vertical in. per hour.

Reciprocal.
14-2234
0.2048
70.1160
10.0
0.0036
6.2278
0.8330
o.i 606
0.0160
0.0204
0.8550
0.5200