The Diatomaceae of Philadelphia 
and Vicinity 
By Charles S. Boyer, A.M., F.R.M.S. 
A description of the diatomaceous flora of Philadelphia and the region within a 
radius of one hundred miles, including the pre- and post glacial deposits occurring in 
the blue clay of the ancient Delaware River has just been issued in book form by the 
J. B. Lippincott Company. 
143 pages. More than 700 original illustrations, enlarged 800 times, 
with complete index. Size 9x12. Bound in Art Vellum cloth. 
Sent postage paid $5.00. 
CONTENTS 
The cell; growth and reproduction; function; motion; classification 
and description of more than five hundred species, many of which 
are new; appendix containing directions for collecting, preparing 
and examining material. 
ORDERS MAY BE SENT TO 
CHARLES S. BOYER 
6140 Columbia Avenue PHILADELPHIA 
The Moss Flora of New York City and Vicinity 
By A. J. GROUT, Ph.D* 
Member of the Botanical Society of America and Fellow of the A.A A.S. 
A carefully annotated list of the mosses found within approximately fifty miles of New York 
City, with localities and time of fruiting. It lists over 380 species and varieties. 8vo, 121 pp., 
12 plates. 
Nominally a list, in reality it is a local manual carefully prepared and up-to-date. The 
key alone will be invaluable to any student of the mosses of northeastern U. S. $J.JO postpaid. 
By the Same Author 
Mosses with Hand-Lens and Microscope. Bound in Cloth, $7.00, in half leather, 
$7.50. 8x11 inches, 416 pages, 88 full page plates and 265 figures in the text. Printed by 
McFarland on the best coated paper. 
Mosses With A Hand-Lens (224 pp., 8vo, copiously illustrated) deecribes 250 mosses 
and 50 hepatics that can be identified by means of the Hand-lens alone. $1.75. 
For Sale. Loeske, Studien sur vergleichenden Morphologic, $1.50. Cavers, Inter-rela- 
tionships of the Bryophyta, $1.50. McVicar, Student's Handbook of British Hepatics, $5.00. 
Muscologia Recentiorum Bridel, Tom II, Pars 1, 208 pp. but lacks plates and Index, 1798. 
Very rare, $1.00. Catalogue of Plants within 30 miles of Amherst College. Tuckerman and 
Frost, 1875, $4.00. Tuckerman. Synopsis N. Am. Lichens, Parts 1 and 2, |15.00. Fink, 
Lichens of Minnesota, 8vo, 51 full page Plates, mostly photographs, 1910, $3.00. FarloVf, 
Marine Algae of New England, $2.50. Science, 1898 to date, price on application. 
Odd numbers and complete volumes of the Fern Bulletin, Plant World, Mycological Bul- 
letin, Muhlenbergia, Bartonia, Bot. Gaz. (running from Vol. 12 to Vol. 52); Bulletin Torrey 
Bot. Club, Vols. 1-6 and others, and practically every American botanical publication. Will 
also buy and exchange any American botanical publication. Prices on application. 
A. J. GROUT, Ph.D., Author and Publisher, 
Tel. 4J2-J New Dorp. New Dorp, Richmond Borough, New York City. 
Always mention the JOURNAL OF BOTANY when answering our advertisements. 
