Articles of Special Interest to Botanists 



In THE MONIST, January 1906 $ .60 



HEREDITY AND THE ORIGIN OF SPECIES (Illustrated) 

 By Daniel T. MacDougal. 



In THE MONIST, April 1906 $ .60 



THE EXPERIMENTAL DATA OF THE MUTATION THEORY 



By J. Arthur Harris, Ph. D. 



In THE OPEN COURT, November 1906 $ .10 



BURBANKS PRODUCTION OF HORTICULTURAL NOVELTIES 



By Prof. Hugo De Vries. 



THE OPEN COURT, December 1906 $ .10 



Will contain A BIOGRAPHICAL SKETCH OF PROF. 



HUGO DE VRIES AND HIS WORK 



By Prof. H. Hus. 



These numbers will be supplied on receipt of price. 



The publishers of THE OPEN COURT and THE MONIST have 

 in preparation a new work by Prof, Hugo De Vries entitled PLANT 

 BREEDING: COMMENTS ON THE WORK OF NILSSON AND 

 BURBANK,. a popular and profusely illustrated work which is to be 

 published January 1st at a popular price. 



THE OPEN COURT PUBUSHINQ CO. 1322 Wabash Ave., Chicago, U. S. A. 



THE BEST W0RK5 ON FERNS 



OUR FERNS IN THEIR HAUNTS, by Willard N. Clute. Octavo, 333 

 pages. 225 illustrations. Eight colored plates. Contains the only il- 

 lustrated key ever published, and a full account of all the ferns of 

 Eastern America. The species can be identified by the illustrations, 

 alone. More copies of this book are sold annually , than of ' any other. 

 Price post paid, $2.50. 



THE FERN ALLIES OF NORTH AMERICA, by Willard N. Clute. 

 Octavo, 250 pages, 150 illustrations, eight colored plates. A companion 

 volume to "Our Ferns in Their Haunts", containing a full account of the 

 scouring rushes, club-mosses, quillworts, selaginellas, water-ferns, etc., 

 etc., in North America. Seven keys to the species. A check list with 

 synonyms. The only book on the subject in the English language. 

 Listed in the New York State Library list among The Best Books of 

 1905. Price post paid, $2.00. 



=== SPECIAL OFFERS 



Either volume and a year's subscription to American Botanist. .. .$2.80 

 Either volume and a full set of American Botanist, (10 volumes) . . . 6.00 



Both volumes to one address 3.80 



Both volumes and a year's subscription to American Botanist 4.50 



Both volumes and full set of American Botanist, (10 volumes) 7.75 



Address all orders to 



WILLARD N. CLUTE & CO., Joliet, Illinois 



