HC Deb 19 May 1958 vol 588 cc63-4W
Mr. Ede

asked the Paymaster-General if he will define the main grades of coal.

Sir I. Horobin

"Large" coal is coal which will not pass through a screen with round holes generally 2 in. in diameter, though they may vary in different screens.

"Small" coal is coal generally with a top size of ½ in. although this can vary in different places up to 1½ in.; it includes everything down to dust.

"Graded" or "Sized" coals lie between the other two categories. That is to say, generally speaking, they range from ½ in. to 2 in. There are however variations in both the lower and upper limits, the former in some cases being as low as ⅛ in. and the latter as high as 2¼ in. Doubles, singles, beans, peas and grains come within the category of "graded".

In 1957 total commercial disposals of home-produced coal—excluding coal used at collieries or supplied to miners—were:

(million tons)
Small 97
Large 49
Graded 43
Unscreened (mostly gas and coking coals) 12
Anthracite 4
Total 205

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