Close-End Liquid Column Manometer, vintage engraved illustration. Dictionary of Words and Things - Larive and Fleury - 1895
Order eight magic square, a symbol assigned to astrological planet Mercury, with the magic constant 260. A magic square with the numbers 1 to 64. The sum of the numbers in any direction is always 260.
Liquid Column Manometers, showing (left) close-end type and (right) open-end type, vintage engraved illustration. Dictionary of Words and Things - Larive and Fleury
Climate control icon. Linear logo of temperature. Black simple illustration of mercury thermometer with circular arrows. Contour isolated vector emblem on white background
Set of classic glass mercury thermometers with different temperature readings. Red and blue liquid columns. Traditional medical measurement tools. Vector illustration isolated on white background.
Temperature progression chart with six vertical thermometers. Red to blue gradient displaying decreasing heat levels. Visual temperature scale comparison. Vector illustration isolated on white.
Glass thermometer, classic black color flat style bulb thermometer graphic with temperature indicator column on isolated background.