At the time, I was fairly confident that the strong technical readings suggested that the Industrials would also make new highs.

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"Customers can read their meters today to make sure the bills are accurate, and also submit their readings to us, so they will be used in the calculation of their bill, " said the spokesman.

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However, instead of each pixel representing a colour, as in the image on a screen, these readings show all the different chemical compounds present in each of the thousands of tiny patches that together make up the sample.

ECONOMIST: Forensic technology