Interesting Book from 70's

[Bundle 2]

The foam is not a recommended treatment...I mean, whats the point or idea behind it eh?

However, it was thought to be a good idea...and as Shigo points out in Modern Arboriculture, it is the least offensive material if it really must be done...

 

The idea it seems is to provide some internal volume/structure to prevent "shell buckling" as described by Mattheck et al leading to what has been described as "hosepipe " type failure....( Lonsdale refers to elder and the mech structure being 1/3 woody epiderm and pith core of 2/3 ( ie, foam ) citing the occurence in nature of the model.)

[Andy Gentle]

interesting to see that british standards were on the go then and that they were aware of HAVS

When did british standards start

i bet that book is a right interesting read

3 strand takes me back a few years

 

Bob, Next time your down you can borrow my copy. When I first started over 20 yrs ago I used this book a lot.....just dug it out, how things have changed.