In article ,
says...
On 27 Feb 2008 17:06:46 GMT, (Nick Maclaren) wrote
and included this (or some of this):


In article ,
®óñ© © ²°¹°-°² writes:
|
| 'Tain't so. Sounds plausible, until you think about it. If that
| were so, how would the sap reach the top of a 50' tree? Even a
| vacuum will raise water only 30'.
|
| Then try Osmosis. It's very powerful, and not limited to 30'
|
| http://en.wikipedia.org/wiki/Osmosis

An old and good physical rule is that, if your explanation allows
you to construct a perpetual motion machine, your explanation is
wrong.

Osmosis still requires energy to drive it.

Osmosis is not perpetual motion. The attractant is fuelled by our
beneficent sun.



Can't be that alone, as if you prune something off it bleeds all night
long.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea