Thank you for letting me &ow about yo-tar              _.
decisioi;.  I expect you are quite ri@~~-k   If 3-1 e x-ray
. diffraction studies of protein are what .i-nterest you most,
in spite of any deterrerit I may have exerted,you can be
reasonably sure that your decision is the best one.  ,I>'1 y
memory only comes back very slowly but i seem to remmber
nom, ani; it may amme you, that a year or so ago when Yerutz
asked me about po ssible people to .join his3n., I ment ioned your
n ane .  ..I2 so, 1 don -
             * t regret it in spite 0-T wha t I s c idL +I" '
There is no doubt of the value and importance of the work
and I hope that some day it will tie on more closely to the
active processes  in muscle in which I am interested.   IF
so9 it y!i.ll be a good thing to have someone mixed up with
. it who <oes
-3    kn 017 s oime thing about- the prt)perties of living &
_r- c
'(US-UK& * Toooften,
      I     the biochemists W'no *work on rmscle
      muscles grolmd up with sand and extra&d! ) &.ve little
idea about the properties of. livin.5 functioning muscle.                9

I have %,eied to pekua'de Astbury at intervals that living
~mscles are not quite the same as dried ones;   and on the
whole 3e has been fairly teachable.   You, with your year
or two at biology, will probably be more susceptible.
                                                       .
         Astbury agrees that in X-&y studies of living
systems 1:mch more .powerful equipment is kecessary in order to
allow shorter exi;posures .   Perhaps some day that will be
available.

Yours sincerely,

Prancis Crick, Xsq.,
Strange%ays Research Laboratory,
Czmbridge.