Study of Beans and Peas Before and After Sprouting

ISBN: 9781330535073 出版年：2016 页码：109 W J Beal Forgotten Books

For these reasons, a plain statement will be made of some things that can be discovered, and in this way the text and illustrations will serve to prepare young persons for independent work suggested by future bulletins. It will be well for you to keep pencil and paper handy for notes, draw and dates, each keeping his own account.