THE PLAN BOOKS 
its ancestry showing how and when its parents 
were bred and their names and those of their 
own forbears. So it goes throughout the 
whole life history of a given plant, be it 
berry or flower or tree or vine. All the facts 
are accompanied by dates, nothing is left 
to conjecture. 
Sometimes the field record is transferred 
to the regular plan book, sometimes the 
information is preserved in its original form 
and placed between the leaves of the plan 
book, which holds many such loose sheets. 
A whole page in the plan book may contain 
data as to one test, sometimes continued to 
another page. The book for the Sebastopol 
tests is a large ledger nearly two feet in 
length. Any one of the pages containing 
data as to a given test is curiously interesting. 
It is covered from top to bottom with 
writing, dates and diagrams. These diagrams, 
or it may be mere ellipses or circles to enclose 
certain related facts, are usually drawn in 
red ink in the midst of the text. They may 
run out into the margin of the book, or they 
may be in the body of the page. They are 
irregular in form and location. They are, how- 
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