A SECOND OHIO WEED MANUAL. 303* 



ACKNOWLEDGMENTS. 



I am under many obligations to correspondents throughout the 

 state. The cordial assistance and the continued interest must be 

 acknowledged as contributing largely to the nature and scope of 

 the list. 



Prof. E. E. Bogue, now of Michigan, and Mr. Wm. Krebs, 

 of Cleveland, have contributed information concerning golden hawk- 

 weed; Mr. E. W. Vickers, of Ellsworth has sent valuable notes on 

 tickseed sunflower with specimens; Mr. W. H. Aiken, College 

 Hill, on Scotch thistle; and Bro. H. Jaske, of Dayton, now deceased, 

 sent specimens of sandwort plantain. More recently I am indebted 

 to E. W. Roush, of Lindse3 r , Sandusky county, for information 

 regarding Erysimum refiandum L. in oats, etc., and to Dr. Keller- 

 man's State Catalogue and Supplement for occurrence of plants. 

 Many others whose names are not given have rendered valuable 

 assistance. 



Of the illustrations Nos. 1, 2 and 3 were supplied by the Bausch 

 & Lomb Optical Co., of Rochester, N. Y.; Nos. 4, 5, 6, 7, 8, 9, 11, 

 16, 22, 23, 25, 26, 32, 36, 38, 41, 44, 47, 65 and 69 were reduced from 

 plates published in Dr. Vasey's Reports as Botanist of U. S. Dept. 

 of Agriculture. Nos. 10, 13, 14, 17, 21, 29, 34, 39, 42, 45, 52, 57, 60, 

 61, 62, 63, 64, 67, 68, 70 and 73 are from Dr. Millspaugh's Bulletin 

 23 of the West Virginia Experiment Station, kindly granted by the 

 late Dr. Jno. A. Myers, Director of the West Virginia Experiment 

 Station;Nos. 40, 51 and 55 are from electros supplied by the U. S. Dept. 

 of Agriculture. No. 71 is a cut drawn by Miss Detmers. The re- 

 mainder are from original drawings made for the Station. Of these 

 latter No. 24 is by Miss Vinnie Cunningham, No. 66 by Miss 

 C. Durstine and twenty-three others are by my wife. I desire to 

 express my obligations to all these persons for the favors granted 

 and assistance received. 



Note.— I have inquiries asking- me to recommend books on botany for self instruction, or for use 

 on the farm. These more commonly seek to find books teaching the names of plants with statement of 

 characters. Upon this branch, Systematic Botany, there are several good works: 



1. Britton and Brown's Illustrated Flora of the Northern States and Canada, 3 vols., each $300. 

 Charles Scribner's Sons, New York. Each species is illustrated and described. This is a work to be 

 recommended for the libraries ef horticultural societies, granges and farmers' clubs. It is useful to all 

 students of botany . 



2. Brittou's Manual of the Northern United States and Canada, 1 vol. $2.00, Henry Holt & Co., 

 New York. This a compact book of 1080 pages and gives the revised nomenclature of recent use 



3- Gray's Manual of Botany, (6th edition). 1 vol. $1.80, American Book Co., New York, Cincin- 

 nati, etc. A standard work on the botany of the northern states. 



4. Grab's Revised Lessons in Botany, American Book Co. is an elementary treatise on botany, but 

 gives no names of plants— simply elements to prepare for that. 



5. Gray's Field Book of Botany, Revised by Bailey, 1 vol., $2.00. Commonly bound with the lea- 



sons. American Book Co., Cincinnati. This book will be found the most helpful to those dealing with 

 cultivated plants. The wild plants are not all included. 



