[quote author=Max link=board=sex;num=1061589610;start=0#13 date=08/29/03 at 14:02:36]
These days here on lpsg there is always someone who knows better
, but until I am put right, here is my very rough method:
Add l + d + w, in cms (in my case 10 + 7.5 + 6.5)
Divide by 3 to get the average diameter (this rough working assumes a sphere)
Divide by 2 to get radius. (r)
Then I use the formula embedded in my brain (rightly or wrongly) from school for the volume of a sphere ... 4/3 pi r cubed.
If anyone knows any better, and can give a method which doesn't assume a perfect sphere (which mine most certainly are not) I'd be glad to hear!
[/quote]
Sometimes direct measures work best. Here's an idea ...
I haven't tried this yet, but it will probably work.
1. get a large glass completely full glass of warmish
water and a bucket.
2. take of your clothes and hop in the shower, taking
said glass of water and bucket with you.
3. here's the hard part. Lower your balls into the
water, catching the overflow into the bucket.
4. measure the volume of water displaced, perhaps
subtracting a few cc to compensate for spills.
I'll give it a try over the weekend, and let you know how
it works.
-- Erik
p.s. If you have someone willing to help, you could have
them slowly raise the glass while you stand still. This method
of measuring volume by water displacement is very old,
but there's no reason it wouldn't still work today, if
carefully done.