Original vintage oil and gas trade magazine ad for TEXAS INSTRUMENTS INCORPORATED, INDUSTRIAL INSTRUMENTATION DIVISION, 3609 Buffalo Speedway, Houston, TX, Cable, Houlab. TI Geophysical Instrumentation Spans The Industry from Its Infancy! Eugene McDermott co-founded Geophysical Service Inc, the first independent geophysical company to specialize in reflection seismograph surveys. This organization is now Texas Instruments, and G.S.I. is its petroleum exploration subsidiary. HR High Resolution Reflection Seismograph; VLF Very Low Frequency Refraction Seismograph; 7000B All Purpose Seismograph; 8000 Transistorized Seismograph; magneDISC, Disc-type Magnetic Recording System; LLI Log Level Indicator; seisMAC, Seismic Magnetic Automatic Computer; VIP, Variable Intensity Plotter; S-36 Refraction Geophone; land and marine seismometers; and the famous Worden Gravity Meters. Old 1959 petroleum industry advertisement. Would look fantastic matted and framed.