NEW RECORDING DENSITOMETER for
THIN LAYER
CHROMATOGRAMS
Direct, Manual or Fully Automatic Scanning of Plates by Visible or U. V. Absorbance, and by Fluorescence. REPRODUCIBLE • ACCURATE • CONVENIENT
PHOTOVOLT • CORPORATION ^ ^ • 1115 BROADWAY · NEW YORK 10, Ν.Ύ.
Circle No. 204 on Readers' Service Card
PHOTOVOLT Electronic pH METERS
A complete line of pH meters, incorporating permanently frictionless taut-suspension indicating meters, modern electronic tubes and circuits. Simple in operation and maintenance; featuring sealed amplifier plug-in units.
High Precision pH Meter Model 110