A POPULAR GUIDE TO THE MOSSES 

 OF NORTHEASTERN UNITED STATES 



How to Know the Mosses 



By Elizabeth Marie Dunham 



'Y^HIS handbook of mosses — the first intended 

 for use without a microscope — throws open a 

 new and fascinating field of study to the ama- 

 teur botanist and nature lover. Keys to eighty 

 genera and descriptions of over one hundred 

 and fifty species are given. 



FuUy Illustrated, $r.2^ net 



HOUGHTON MIFFLIN COMPANY 

 Boston New York 



PHOTOGRAPHY FOR NATURALISTS 



Expert service in photographing Botanical Specimens for reproduction in 

 Magazines, or for Class Room Work. 



Lantern Slides from film or glass negatives, engravings, photographic prints, 

 or natural objects. Copying from every sort of original. Films developed and 

 printed. Enlargements in all sizes. 



Everything Photographic needed for Illustration by Writers and Teachers. 



WE CAN SUPPLY IT. 



G. K. MERRILL, 564 Main Street, Rockland, Maine 



FOR SALE 



A set of Austin's MUSCI APPALACHIAN!, about 450 specimens, 

 neatly mounted on cards. Price, $35.00, cost of delivery not in- 

 cluded. Terms, Cash with order. Address, 



EUGENE A. RAU, 170 Church St., BETHLEHEM, PA. 



