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This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

History is not a snap-shot. Events happen, and the true record of them follows at a distance. Sometimes the early report is too voluminous, and it takes time to reduce it to truth by a winnowing process that divides chaff from grain. This has been the case regarding every great modern battle. Sometimes, on the other hand, the event was obscure and became important through the rise of other, later conditions; in which case, instead of winnowing, the historian sets himself to gleaning the field and making his grist out of scattered bits of its fruitage. This has been the case regarding the...

High Performance Liquid Chromatography (HPLC) is a common method for analyzing substances and is used by researchers to measure the amount of caffeine in coffee, for example, or the level of penicillin in a blood sample. The process involves separating a substance into its individual components and then examining the result.