April 13, 1939.

Central Seientifie Coe,
1700 Irving Park Blvde,

Dear Sirss

We are sending by express an Impulse Counter which
was purchased from you last November. The coumter
frequently stops at 29 and for that reason we are re=-
turning it to you asking that it be properly repaired
end returned to us as early as possible since we are in
need of it for an experiment which we are conductinge

Sincerely yours,

Ee Re Elbel,
Asste Professor,
_ ° Physical Education.