BECKMAN

[ RECORDING AND NONRECORDING SPECTROPHOTOMETERS OPERATING IN THE VISIBLE, ULTRAVIOLET, OR INFRARED RANGES OF THE SPECTRUM; MONOCHROMATORS; ACCESSORIES FOR SPECTROPHOTOMETERS SOLD SEPARATELY THEREFROM-NAMELY, FLAME PHOTOMETRY ATTACHMENTS, FLUORESCENCE AND NEPHELOMETRY ATTACHMENTS, DIFFUSE REFLECTANCE ATTACHMENTS FOR MEASURING THE DIFFUSE REFLECTANCE OF OPAQUE SAMPLES, RECORDING ATTACHMENTS FOR CONVERTING NONRECORDING SPECTROPHOTOMETERS TO THE RECORDING TYPE, GAS AND LIQUID SAMPLE ABSORPTION CELLS, PHOTOMULTIPLIER ATTACHMENTS FOR INCREASING SENSITIVITY, TEMPERATURE-CONTROLLING BATH EQUIPMENT FOR THERMOSTATING SPECTROPHOTOMETRIC APPARATUS, GAS HANDLING ACCESSORIES FOR MEASURING AND PURIFYING GAS SAMPLES AND CONDUCTING SUCH SAMPLES TO THE SAMPLE CELLS OF INFRARED SPECTROPHOTOMETERS; ] PH METERS [ ; AUTOMATIC TITRATORS FOR PERFORMING POTENTIOMETRIC AND DEAD-STOP TITRATIONS; COLORIMETERS FOR ANALYZING SAMPLES BY MEASUREMENT OF A CHARACTERISTIC COLOR ABSORPTION AND FOR MAKING SUCH MEASUREMENTS CONTINUOUSLY ON FLOWING OR STATIC LIQUID OR GASEOUS SAMPLES; CHART RECORDERS FOR RECORDING GALVANOMETER MIRROR AND OTHER TORSION-MIRROR DEFLECTIONS; OHMMETERS; VACUUM TUBE ELECTROMETERS; MICRO-MICROAMMETERS; ELECTRO-PHORESIS -CONVECTION APPARATUS FOR PROTEIN FRACTIONATION; ANALOG COMPUTER ELECTRONIC ANALOG-TO-DIGITAL CONVERTERS; CONTROL KNOBS FOR ANGULARLY ADJUSTING AND MEASURING THE POSITION OF A SHAFT; ] AND COMPONENT PARTS OF EACH OF THE FOREGOING SOLD SEPARATELY THEREFROM