PREFACE IX 



information. Professor Ph. Biourge and Dr. Paul Simonart at Louvani 

 put their entire collection at our service after preparing and demonstrating 

 their interpretations in their own laboratory. Dr. Raoul Mosseray sent 

 his extensive series of variants in the Aspergillus niger group as accumulated 

 from the Belgian Congo. Dr. Adalbert Blochwitz made many comments 

 and criticisms in his numerous letters. Professor Harold Raistrick and 

 Mr. George Smith submitted all strains reaching their laboratory with 

 full notes on their own interpretations. Cultures and photographs, some 

 of which are used in this manual, have been furnished by Messrs. John and 

 Edward Yuill. Series of cultures have been received from Drs. Marie 

 B. Morrow and J. J. Taubenhaus in Texas, Drs. Roberta Ma and Y. K. 

 Shih in China, Drs. G. Kita, R. Xakazawa, J. Hanzawa, and K. Oshima in 

 Japan, Drs. G. R. Bisby and G. A. Ledingham in Canada, and Dr. H. Macy 

 in Minneapolis, as well as individual strains from many correspondents. 

 The laboratory collection owed much of its completeness to the punctilious 

 workmanship and painstaking scholarship of Dr. Margaret B. Church. 



In the preparation of the manuscript outstanding contributions have 

 been made by Dorothy F. Alexander who prepared the line drawings and 

 assisted generously in the checking and proofreading of the textual material; 

 by Mr. Roland W. Haines, Photographer of the Northern Regional Re- 

 search Laboratory, who made all the color pictures, as well as many of the 

 black and white photographs; and by Miss Nancy Brant who typed the 

 manuscript in its final form. 



The authors are indebted to the Chas. Pfizer and Company Inc., Brooklyn 

 New York, for underwriting the cost of reproducing the natural color 

 photographs. 



Administratively, the preparation of this manual was made possible by 

 the vision of Dr. O. E. May, Chief of the Bureau of Agricultural and 

 Industrial Chemistry, Mr. H. T. Herrick, Director of the Northern Re- 

 gional Research Laboratory, and Dr. Robert D. Coghill, Chief of the 

 Fermentation Division of the Northern Regional Research Laboratory, 

 who have developed the industrial exploration of the biochemical utili- 

 zation of the fungi over many years. 



The Authors 



