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It was in the late nineteenth century that, following the discovery of X-rays, scientists suddenly embarked on a serious research programme to trace various other similar rays. |
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Following the discovery of X-rays in the nineteenth century, comprehensive research was soon undertaken by scientists in order to detect other rays of the same kind. |
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Towards the end of the nineteenth century, when Xrays were discovered, scientists were already involved in extensive research in order to study other kinds of rays. |
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The discovery of X-rays in the late nineteenth century motivated scientists to carry out exhaustive research in order to detect other types of rays. |
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When X-rays were discovered in the late nineteenth century, scientists immediately set out on intensive research to find other similar types of rays. |