h 



. KAMERimOH 0SNE3. Method, .nd app.mtu, „sed in the Cry.gemc Ubor.tery^ I„. B.th, of ver, uniform end 

 conatent low tempemtures in the cryostat 



P1.AT1: III. 



■ 



Proci'pdinps Roynl Aca.l. Amslerdiini. Vol. V. 



