:53:00
That's right.
:53:01
Pierre, that's it.
That must be it...
:53:05
Yes, that must be it.
:53:07
Alright. Alright.
Go ahead and check it.
:53:09
Father, it's just that, well
:53:11
Marie has so many setbacks
with her work.
:53:12
That's alright.
Don't stop doing...
:53:14
Please. Go ahead.
:53:15
It's just that I've been
waiting for so many months.
:53:17
It's alright, my dear.
:53:18
I hope you won't mind
if I stay long enough
:53:20
to finish my coffee.
:53:21
Please do and we'll try to
get back before you go.
:53:23
Thank you, my boy. Thank you.
:53:25
Good bye.
:53:26
You know, sometimes that son of
yours is not quite all right.
:53:29
Nice having dinner with you.
:53:31
You know, I'll never
come to this house
:53:34
but for the sake...
It's Alright, George.
:53:38
It happens every time.
:53:53
Well?
:53:55
It's alright.
Nothing wrong with it.
:53:57
I was wrong.
: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.