The coal-tar colors : with especial reference to their injurious qualities and the restriction of their use : a sanitary and medico-legal investigation / by Theodore Weyl ; with a preface by Professor Sell ; translated with permission of the author by Henry Leffman.

  • Leffmann Henry, 1847-1930.
Date:
1892
Catalogue details

Licence: Public Domain Mark

Credit: The coal-tar colors : with especial reference to their injurious qualities and the restriction of their use : a sanitary and medico-legal investigation / by Theodore Weyl ; with a preface by Professor Sell ; translated with permission of the author by Henry Leffman. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    TRANSLATOR'S PREFACE. Dr. Weyl's essay which I present in English dress, came into my possession a couple of years ago, and seemed to me to be of such practical value in an important department of hygiene, that I sought permission to translate it, a request which was kindly and promptly granted by the author. The widespread employ- ment of artificial colors in articles of food and household use and the absence of any comprehensive or even positive informa- tion in English as to their actions on the human system, will make the publication opportune. I undertook the translation over a year ago, but the close ap- plication to my college work and to my duties as Port Physician of the Port of Philadelphia, during the last fall and winter, has caused considerable delay. The introductory articles by Professor Sell and Dr. Weyl ren- der an elaborate preface unnecessary, but I may speak briefly of some of the features of the essay which will be more likely to suggest themselves to an American than to a European reader. The treatise will be found decidedly more technical than is usual in articles addressed to medical and sanitary circles in this country. I foresee that the array of formulas and reactions, especially the ring symbols of benzene and naphthalene, may deter many from perusal of the essay, yet the essential matter is so distinctly set forth that the chemical portion may be passed by those who are unable to comprehend it. I have deferred a little of the purely theoretical discussion to the appendix; but, of course, I have not felt at liberty to omit any appreciable por- tion of the text. The original work contains numerous references by foot-note
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