wall, auxiliary, balance, and combina tion tables. Construction details of all units are included. M e t a l a b E q u i p m e n t Co. (Cat.6-C). L-39 V i s c o s i m e t e r . Illustrated 8-page bro chure describes and gives specifications l'or the MacMichacl viscosimeter and accessories. A discussion of the instru ment's operating principle is offered. Prices included. Fisher Scientific Co. ι Bull. FS-217). L-40
Permanently durable surface can be scrubbed, scoured or honed without harming the surface
S i e v e S h a k e r . Illustrated 8-page b r o chure describes t h e Fisher-Wheeler
