Reaction wood

Bill, I got the same book, and that part left me scratching my head. Last fall I got a Walnut branch that came off horizontally. It was about 24 inches high, and 12 inches wide. The pith was located about 6 inches down from the top of the branch. This seems to hold true for every other leaning tree and branch that I have collected. The extra build up is on the compression side of the tree and not on the tension side. robo hippy

Bill R wrote:

It's not April 1st already is it?

Just a test--keep moving on, nothing happening here.

"Bill R" wrote: (clip) 2. Do tree branches on the equator have equal size growth rings above and below the pith?(clip) ^^^^^^^^^^^^^ Only for those branches which lie directly above the equator (pointing east or west.) As the angle of the branches shifts toward north or south, the position of the pith moves up or down. Because of statistical uncertainty, and lack of sufficient data, it is not clear whether the shift is proportional to the angle, or to the sine of the angle.

Another interesting effect is that trees that grow at the north or south poles do not grow at all.

Did you know that water leaving the bathtub drain swirls counter-clockwise below the equator?

Barry

Apparently not.

I vaguely recall that Hoadley says something similar but it was concerning hardwood v softwood rather than hemispheres. Too late to look it up at the moment. That ring a bell w/anyone?

...Kevin

Two words: Coriolis force.

todd

"Bill R" skrev i melding news:d00613$866$ snipped-for-privacy@newsg1.svr.pol.co.uk...

They also have their panhandles on the other side of their pans, due to their being on the opposite side of the earth.

Bjarte

Is that where my left handed frying pan came from?

Why not ask O'Donnell? I tried, but I couldn't find a net address. Anyone?

Musing about Bill's question; a long time ago England sent lots of people and acorns to Australia and America both have reacted very well.

Turn to Safety, Arch Fortiter

The chapter in the book also goes on to say that the size of the growth rings of softwood are opposite to that of hardwood and also reverse in the southern hemispere.

This may mean that in the southern hemispere the meaning of soft and hard may be reversed.

No - this is starting to make my head hurt.

BillR

Well, I went out to collect another black walnut tree yesterday, and checked and confirmed, the buildup on limbs is on the compression side of the branch and tree, not the tension side. robo hippy

So you live in the northen hemisphere. All we need now is an Aussie or Kiwi to stop sunning themselves (lucky dogs) and go and lop a branch and report back.

BillR

Most of us around northern Australia try and avoid the sun if at all possible. Its just too bloody hot in summer. Thoug I imagine, as much as we complain about the heat, we would complain even louder if we had below zero maximums. Mick

Mike,

From what you say about the temperature I suspect you do not have a wood pile like our American and Canadian cousins, unless you have a wood burning freezer.

I would like to know whether the reversal of reaction wood north/south is true or just one of those myths that just gets repeated until people believe it.

BillR

It's been a long winter. I propose we all go to NZ or Oz and check for ourselves. I could use the break...

...Kevin

Its been a long summer, cant wait for it to finish mick