TO-MORROW NEVER COMES 



Underwood and Underwood Ewing Galloway 



Agricultural progress has been made possible largely through scientific discoveries and 



inventions. 



Forestry, scientific farming, and animal and plant breeding are 

 vocations that constantly need more recruits. Biology has con- 

 tacts with all these vocations and is a means of giving students 

 such information that will help them to decide whether they 

 would like to pursue a scientific vocation. 



To-morrow never comes. This book cannot give the latest 

 information about living things. Before it leaves the printer's 

 hands a new vitamin may be discovered, the cause and cure for 

 cancer may be announced, a new and unexpected theory may 

 necessitate a check and revision of much of the work that has 

 been set forth in these pages. If you who read are careful in 

 scrutinizing all data before you make a conclusion, you will have 

 become more scientific. You may be one who will add a chapter 

 to the biology of to-morrow ; you may learn and tell the farmers 

 of to-morrow how to grow two blades of grass where one formerly 

 grew. This Advanced Biology includes the story of the biology 

 of yesterday and of to-day. If it has been well told, it should 

 make your to-morrow a healthier, happier, and more complete day. 



WH. FITZ. AD. BIO. 



