:54:00
I was sure we've found it.
:54:03
Well...
:54:06
I don't know. I'm sorry.
:54:10
You tested all of the elements.
you're sure of that, Marie?
:54:13
Yes, I'm positive, Pierre.
:54:14
And you found that
only two of them...
:54:16
uranium and thorium
gave off rays.
:54:17
That's right.
:54:18
Then
you measured the uranium and thorium
:54:19
in the pitch blende ore.
:54:20
And that's when I run
into trouble.
:54:22
The pitch blende has more
radioactivity than I can explained
:54:25
by the amount of
uranium and thorium had in it.
:54:29
Would you like to show me
:54:30
how you make your measurements
Marie?
:54:32
You wouldn't mind?
:54:33
Of course not.
:54:34
Alright.
:54:39
Here is what I've done
so many times that I lost count.
:54:43
Here is crude pitch blende.
:54:45
Now we know that
the rays came from the uranium
:54:47
and thorium that are
in this pitch blende.
:54:49
Those two elements
give off the rays.
:54:50
Correct.
:54:51
I put the pitch blende
in this mortar.
:54:52
Has the mortar always been clean?
:54:53
Always and grinded up.
:54:55
Here is the ground pitch blende
:54:57
throw in the uranium
and thorium in it
:54:59
I also fill a disk level full.
:55:01
Just like what I've done
every time.
:55:02
Then I placed it
in the electrometer.
:55:08
And I close the case
so there is no draft.
:55:10
Good.
:55:11
I charged the electrometer.
:55:19
Now I will find out
how much energy to raise
:55:21
in the pitch blende they have
is it right?
:55:22
Right. Start.
:55:25
Ready. Read.
:55:39
Eight.
:55:41
Eight.
:55:41
Same reading as I always had.
:55:44
This pitch blende
with the uranium and the thorium
:55:46
still in it comes to eight.
:55:48
Now, here is pure uranium
:55:50
I strike it
in the same amount of pitch blende.
:55:52
This is exactly the same case
close the case
:55:55
charged the electrometer
:55:57
Now, we will find out
:55:58
how much energy
the rays in the uranium have.