A Simple Device for Gravimetric Sampling.

In view of the increased importance attached to the gravimetric sampling of airborne dust in mines and other working places, it was recently decided to start regular gravimetric sampling in the experimental animal dusting rooms in this Unit. As no suitable sampling instrument was available, a Hexhlet dust sampler was modified by fitting it with a probe in place of the elutriator. This instrument has also been used to collect samples of airborne particulate matter from within chimney stacks and exhaust ducts and also unelutriated samples of dust from the air in working places.