VISUAL DESCRIPTION
This is a vintage advertisement featuring the tagline "The thirst for positive knowledge" at the top, followed by an image of a hand holding a glass with what appears to be soda water being poured into it, capturing the effervescence and dynamic motion of the liquid. Below this image is another slogan that reads "Say when!" which suggests precision or knowing just the right amount—akin to telling someone when to stop pouring your drink. The text below provides context, expressing curiosity about what that turbulent rush of soda water looks like and mentioning how high-speed photography can capture images in less than one-millionth of a second. It then transitions into promoting Weston Instruments as providers who meet such precise needs for knowledge. At the bottom, we see branding elements: "Weston * POSITIVE KNOWLEDGE - FROM TAKE OFF TO TOUCH DOWN * Aircraft Instruments, " indicating that Weston specializes in aircraft instruments offering reliable information from takeoff until landing. The company details are provided at the very bottom: "Product of SANGAMO WESTON LTD. , Enfield . Middx. " This places the company in Enfield, Middlesex (historically part of Greater London), England.

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