185 (191)
2137,9
The Chairman. It would be 67 per cent. instead of 100 per cent, increase.
A. You see, the only thing as regards the cost of say 100 feet of this super, for purpose of comparison if you put in the hard material I recommend, you will bring the cost up to the same thing.
Mr. Shelton Hooper.-You will bring the bulk up to the same thing?
A.-The bulk will be brought up to more, because I would recommend more than six inches of hardcore, about nine inches of hardcore, but if I might be allowed to correct that price, I think it is a little low to say double. For instance, a good lime concrete can be got here for $3 a yard cube. It is very difficult to get it good, and I dont think that cement concrete, going into it carefully, could be got for $6. I should say it would be more likely $9, three times instead of twice, if I might be allowed to correct thất.
Mr. Fung Wa Chun.-That means four inches, instead of six inches ?
A. Yes.
Q.-And yet it would cost $9 ?
A. That is the price per yard cube.
Q.-Four inches ?
A. No, that has nothing to do with the thickness. That is merely the price of the material.
Mr. Shelton Hooper. Now, coming back to lime concrete, do you not think it is possible to make a floor of concrete, composed of lime that would be impervious to damp?
A. No.
Q. And do you say that on account of the lime ageing or on account of any of the other materials which are used ?
A. It is partly on account of the lime and partly on account of the red earth, which is used.
Q.-Well, coming first to the lime, and what is generally used is known as shell lime ?
A. Yes.
Q.- Now, is it not possible if care were taken that you can get shell lime free from dirt?
A.-If you could do away with the position taken by the lime burners themselves, I could give you briefly a reason for the adulteration of lime here, if you would like to have it.
Q.-Be brief.
A. The lime is burned by heaping the coral and shell in layers with grass in between. There is a layer of grass on a layer of coral. A small boy turns a fan to create the draught. There is a certain amount of sand existing in the interstices of the coral. That sand does not become lime, it remains as sand. The heat is not very great in a furnace of that description.
The Chairman.—You are talking of the old fashioned lime kilns, aren't
you?
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