<https://octopassscientific.com/product/zeal-wet-and-dry-bulb-hygrometer-masons-type-2/#product>
<http://schema.org/description>
"Description\r\nZeal Wet and Dry Bulb Hygrometer ? Mason?s Type, Country of Origin: England. Made in China\r\nZeal Wet and Dry Bulb Hygrometer / Psychrometer Mason?s Type by ZEAL England P501 C F PSYCHROMETER -20? to 50?C Wet &amp;amp; Dry Bulb Hygrometer Humidity Temperature Meter Tester Pinless Analog Moisture Measurer (50 mm). Mercury Base Zeal Hygrometer."
<https://octopassscientific.com/product/zeal-wet-and-dry-bulb-hygrometer-masons-type-2/>