A New Service - 
. . . BOOKS 
Modern Customer-Clientele Demands Quality 
Plants Grown by Modern Methods 
The past generation has seen the culture of 
plants develop from one of native knack to a 
definite science. This is being brought more force- 
fully home each year. Realizing this, The Joseph 
F. Martin Co., as another phase of its policy of fine 
service, is bringing to its customers, for the first 
time this year, two up-to-the-minute publications 
by men renowned in their respective fields of plant 
culture. 
Each year public institutions and individuals 
are spending money and accomplishing much to 
help us improve our methods and ultimately our 
product. The best way for us to reap the fruits of 
the work being done for us is to read the books that 
tell us what these are and how to apply the new 
techniques to our profitable advantage. 
These are the books you must have—modern 
detailed new editions strictly up to the minute. 
COMMERCIAL FERTILIZERS, THEIR 
SOURCES AND USE—3rd Edition 
By GILBEART H. COLLINS, Ph.D., Professor of 
Soils, Clemson Agricultural College. 
131 Illustrations, 12 in Colors. 480 Pages. $4.50. 
(Published August 1, 1941.) 
This book is an authoritative source of information on all 
problems concerning commercial fertilizers and their use in 
gaining larger yields of field and horticultural crops. The 
material is based upon the rich practical experience of the 
author as an experiment station agronomist and teacher, and 
includes information recently developed by agronomists, 
chemists, engineers and fertilizer manufacturers. 
CONTENTS 
Origin and Development of the Use of Commercial Fertilizers; 
Source, Production and Use of Sodium Nitrate; Manufacture 
and Use of Ammonium Sulphate; Manufacture and Use of the 
Synthetic Nitrogenous Fertilizers; Sources and Uses of Organic 
Nitrogenous Fertilizers; Sources and Uses of Mineral Phos- 
phates; Sources and Uses of Bone Phosphate and Basic Slag; 
Manufacture and Use of the Superphosphates; Use of Am- 
monia Solutions as Sources of Fertilizer Nitrogen; Production, 
Manufacture and Use of the Potash Fertilizers; Fertilizers 
Carrying the Secondary Essential Elements—Sulphur, Calcium 
and Magnesium; Fertilizers Carrying the Rare Essential Ele- 
ments; Elements Not Esential for Plant Growth; Adjusting 
Soil Reaction and Fertilizer Practice to Crop Requirement; 
Principles Underlying Purchase of Fertilizers; Principles Under- 
lying the Use of Fertilizers; Application of Fertilizers and 
Influence on Germination and Seedling Growth, Bibliography. 
COMMERCIAL FLOWER FORCING 
—3rd Edition 
By ALEX LAURIE, B.S., M.A., Professor of Flori- 
culture, and G. H. POESCH, B.S., M.S., Assistant 
Professor of Floriculture, Ohio State University. 
(The Fundamentals and Their Application to the 
Culture of Greenhouse Crops) 
49 Iilustrations, 565 Pages. $4.50. 
(Published July 18, 1941) 
This book presents modern floriculture in a way that is 
useful and practical to both the commercial florist and the 
student. In this new edition gravel culture, which is gradually 
evolving into commercial practice, has been given consider- 
able attention enabling any grower to start safely on a small 
scale and expect assured results. A useful table of nutrient 
ievels for many greenhouse crops is given; research in_ soil 
sterilization, temperature control, importance of humidity, 
simplification of the use of growth promoting substances and 
newer measures of pest control have been incorporated. 
CONTENTS 
Status and Development of the Industry; Greenhouse 
Construction and Heating; Factors Influencing Plant Growth; 
Soils; Fertilizers; Reproduction; Diagnosing Greenhouse Ills; 
Major Crops; Minor Crops; Miscellaneous Cut Flower Crops; 
Bulbs, Corms and Tubers; Flowering Pot Plants; Foliage Plants; 
Forcing Hardy Plants; Cloth Houses; Wholesale Marketing; 
Costs of Production; Gravel Culture; and many others. 

