BAKTERIOLOGISKA INSTITUTIONEN
KAROLINSKA INSTITUTET
STOCKHOLM 60
Stockholm, March 23rd, 1959.

Prof. J. Lederberg

Department of Medical Genetics
Stanford University

Stanford

Californien, USA

Dear Prof. Lederberg,

This is just to tell you that a ball-joint of the type you saw
in our laboratory, and wanted to study, has been sent under separate

cover. It is manufactured by: Ingenidérsfirman Sinus, Vullingatan 37,
Stockholm ¢,

I am sorry about the delay in this matter, but it completely
slipped my mind until the other day.

Best wishes and looking forward to seeing you

Si rely yours s
| de?

ever
C.-G. Hedén