RECENT BOOKS AND 

 SEPARATES 



Freeman, Minnesota Plant Diseases, 1905 $1 .30 



Bergen, Elements of Botany, 1898 75 



Massee, Diseases of Cultivated Plants, 1915 1 .00 



Rankin, Manual of Tree Diseases, 1918 1 .50 



Bailey, The Nursery Manual, 1920 1 .25 



Crosby and Leonard, Manual of Vegetable Garden Insects, 1918 1 .50 



Clements and Clements, Rocky Mountain Flowers, Cloth, 400 pp., profusely illus- 

 trated in color 3 . 00 



Arthur and MacDougal, Living Plants and their Properties 1 . 25 



Conard, The Water Lilies. Quarto, 30 colored plates, 1905 6.50 



Livingston, B. E. Atmometry and the Porous Cup Atmometer, paper, 64 pp. 1915. . .75 



Free, E. E. Studies in Soil Physics; five journal articles, 1911 75 



Livingston, B. E. and Edith B. Shreve. Improvements in the Method for Determin- 

 ing the Transpiring Power of Plant Surfaces by Hygrometric Paper. Paper, 24 



pp., 1916 40 



Shreve, Forrest. A Map of the Vegetation of the United States, with map in color 



and descriptive text 50 



Parish, S. B. An Enumeration of the Peteridophytes and Spermatophytes of the San 



Bernardino Mountains, California. Paper, 50 pp., with supplement, 1917 50 



Shreve, Edith B. An Analysis of the Causes of Variations in the Transpiring Power 



of Cacti. Paper, 54 pp., 1916 60 



MacDougal, D. T. The Deserts of Egypt, Paper, 27 pp. illustrated, 1913 40 



Shive, J. W. An Improved Non-Absorbing Porous Cup Atmometer. Paper, 4 pp., 



1915 20 



LETTERING SHEETS 



We offer a series of six sheets of letters, figures, words, and symbols for the lettering 

 of diagrams and drawings for line cut reproduction. 



The lettering is in bold type in two sizes, and in italics. The sheets are Dennison's, best 

 quality white gummed paper. A wealth of words and abbreviations relative to time, weights, 

 measures, climate, and experimental results, as well as chemical symbols, abbreviations used 

 in morphology, etc., will give these sheets a wide utility. 



Sample on request 



Per sheet 10c Set of 6 sheets 50c Six Sets $2.00 



THE PLANT WORLD COMPANY 



TUCSON, ARIZONA 



