How To Get Waterproofing Substances From Plants
Joseph H. Boatwright.
![](http://assets.echocommunity.org/book/b32bdbf1-5d7a-41e1-bf99-6918b03cfcce/how-to-get-waterproofing-substances-from-plants_thumbnail.jpg?w=400)
This manual is concerned with the methods of waterproofing all types of soil construction.The first and easiest way to obtain a waterproofing agent from a tree is through Its sap. Since many trees will not have a free flowing sap, and many that do not have useful sap, all kinds of trees must be tested.
11019-BK
A VITA Publication
11 pages, illustrated
Detail Penerbitan
- Penerbit: Volunteers in Technical Assistance,
- Dewey Decimal: 691.99
- Perpustakaan ECHO: 691.99 BOA