GILSON

APPARATUS FOR RECORDING RAPID CHANGES OF OXYGEN CONCENTRATION IN SOLUTION; HIGH VOLTAGE APPARATUS FOR THE SEPARATION AND ISOLATION OF AMINO ACIDS, PEPTIDES, PROTEINS, NUCLEOTIDES, NUCLEOSIDES, PURINES, PYRIMIDINES, PHOSPHORIC ACID ESTERS, FATTY ACIDS, SUGAR COMPLEXES, STEROID DERIVATIVES, DINITROPHENOL AMINO ACIDS, AND INORGANIC IONS AND OTHER SUBSTANCES BY MEANS OF ELECTROPHORESIS; DYE TRACERS; FRACTION COLLECTORS AND ACCESSORIES; ULTRAVIOLET ABSORPTION METERS; DIFFERENTIAL RESPIROMETERS; THERMOSTATICALLY CONTROLLED BATH FOR LABORATORY USE AND ACCESSORIES THEREFOR; AND LABORATORY APPARATUS FOR TRANSFERRING LIQUID SAMPLES

APPARATUS FOR MEASURING, INDICATING AND RECORDING ELECTRICAL CURRENTS IN THE BRAIN AND LENGTH AND DURATION OF HEARTBEAT AND OTHER PHENOMENA