Salt Water

“Salt Cedars (Tamarix) might be planted to mine … salts, themselves being used in the production of fuel and fertilizer (somewhat salty).”

It is a simple matter to use containers to prevent these from becoming invasive. They can also be harvested to extract the salt from them.

Bacteria

Some bacteria are acidophilic, meaning they love acid and often hate alkaline baking soda. Bacteria that love baking soda may hate acid.

Most life requires some salt, but enough salt will kill anything.

Useful medical information.

Transmute Weeds into Rich Compost Dirt

There is still some fiber left, but it is richly rotten.

The difference between the old soil and the new soil is dramatic.

These weeds were collected from our yard and soaked in a bucket of water in our greenhouse over the winter. We weeded anyway, so the only added work was filling the bucket with water and leaving it in our greenhouse.

Parabolic Form

This is what a form for a parabolic dish can look like.

Wealth

Money is a medium of exchange that represents value and wealth. 

Value is created out of thin air by ingenuity.

Teaching Children

I did or saw a variety of things done when I was growing up.

It is probably a good way to teach by having students do it once.  I remember many things that way.

Model a Parabolic Dish

 It is extremely difficult to calculate the shape of sheets for a parabolic dish, but it is easy to calculate a form.  A step form for a parabolic dish would consist of a rising series of shrinking circles. 

For total y height and x radius, p = x^2 / y. 

For every three to six inch interval for y, x = sqrt(py).  The diameter of each rising, shrinking circle is 2x.  For a parabolic dish of 24 inches wide & 12 inches high, p = (24/2)^2 / 12 = 12.  

y	x	x in	x 16ths in
3	6.000	6	0
6	8.485	8	8
9	10.392	10	6
12	12.000	12	0

Formula for the perimeter of a parabolic dish at EFunda Area and Perimeter of a Parabola