We conclude our series of rubber-related blog posts with this picture (see below).

(No, it’s not part of a weapon 🙂 ) Ever seen one of these before? This is, of course, a Latexometer. This instrument (shown above) is made to measure the specific gravity of raw latex; this one in our collection is calibrated in gallons of latex. The calibration is 0.5/2.5 lbs/gallons at 28.9°C.

Today Latexometers are calibrated in grams of dry rubber per litre of latex and adjusted at 28.9°C (84°F).