Excerpt from Chemistry of the Proteids

It was in the first instance my intention to present to English readers a translation of Dr. Otto Cohnheim's Chemie der Eiweiss Koi per, the first book of its kind dealing with this abstruse subject. In the performance of my self-imposed task I found, however, that, apart from bringing the subject-matter up to date, there was room for extension, and on certain questions it seemed to me necessary to express opinions at variance with those held by the distinguished author. Under these circumstances it soon became apparent that the work, as presented now to the reader, was no longer a transcript of the German textbook, so that, whilst readily admitting that the present volume is largely based on Dr. Cohnheim's second edition, I thought it better to incur the entire responsibility for all matter therein contained, whilst publicly admitting my indebtedness to Professor Otto Cohnheim of Heidelberg. Proof-sheets of this book were submitted to Professor Cohnheim, and my action in regard to this matter has met with his entire and cordial approval.

The points on which special stress has been laid are as follows: -

1.Cellular metabolism is a cyclic event and not a question of anabolism and catabolism. That, throughout, the biological aspect of chemistry has been specially kept in mind will be seen by referring to the Index under the heading of 'Physiological considerations.'

2. Every care has been taken to give each investigator his due, for I hold Science to be above any consideration of nationality. The reactions in daily use have all been traced back to their originators, and in the chapter dealing with the synthesis of albuminous compounds the respective merits of the different workers have been duly set forth.

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