.EEDS & NORTHRUP TO BE PRECISE ABOUT IT I Tell me, pretty pH meter, are there any I more at home like you? Yes, sir. We're ] a family: four from Leeds & Northrup. Four with handsome rugged cases cast • in aluminum. Four finished in a subtle * green, aloof from chemicals and scuffs. But the finish is just the start. Behind every pretty face there are solid state-ofthe-art circuits. High impedance behind the high fashion. Beautiful stability behind both pH and specific ion measurements. And for a good measure: super scales. Soothing yellow and mirror backed. The better to see (and to measure) millivolts Î. and pH. Known increment and log scales for divalent and monovalent cations and ï anions. And for precise direct display: a digital model with large 5-digit readout. I All four with the same inside story: T e m p e r a t u r e c o m p e n s a t i o n . Recorder output. High impedance circuit. Polarizing current output. All this plus a slope compensator for the Digital, Research and Expanded Scale models. J Who's easiest on the eyes? All beauty. All brawn. Who but Leeds & Northrup to be precise about it. (To be informed about it, contact the L&N field office nearest you. Or write Leeds & Northrup, North Wales, Pa. 19454.)
LEEDS &
NORTHRUP
Circle No. 28 on Readers' Service Card
