LETTER OF TRANSMITTAL 



Iowa Geological Survey. 



To Governor George W. Clarke and Members of the Geological 

 Board: 



Gentlemen : I submit, herewith, a bulletin on The Weed Flora 

 of Iowa and recommend that it be published for distribution among 

 the people of the state. 



The thanks of the whole state are due Dr. L. H. Pammel of the 

 Iowa State College of Agriculture and Mechanic Arts for the 

 preparation of a comprehensive and thorough report, represent- 

 ing many years of careful and painstaking scientific work, on a 

 subject that is most intimately related to agriculture, the industry 

 that far exceeds in importance all other industries of our great 

 state. 



The Survey wishes to express its thanks to Dean Curtis, Director 

 of the Iowa Agricultural Experiment Station, for his co-operation, 

 and for his kindness in permitting the Survey to include in the 

 bulletin on weeds results of investigations which were carried for- 

 ward by Doctor Pammel while connected with the Experiment 

 Station. 



The Iowa Geological Survey had the honor, about ten years 

 ago, to publish a complete monograph by Doctor Pammel on the 

 Glasses of Iowa. This publication proved to be of great value, 

 and it is with the fullest confidence that the bulletin on The Weed 

 Flora of Iowa will be of equal if not of greater service to the 

 agricultural and related interests of the state that it is now pre- 

 sented for publication as Bulletin 4 of the Iowa Geological Survey. 



I have the honor to be, 



Yours very sincerely, 



George F. Kay, 

 State Geologist. 



