Abstract
For sampling air-borne spores a portable volumetric trap (which impacts spores down to 4μ diam. on a stationary glass slide for microscopic examination) is operated manually by a light sliding-vane pump. Samples of from 50 to 100 l. are taken in from 5 to 10 min. The apparatus can be used in places where a power supply, required for operating an automatic spore trap, is not available. Tests show it to be suitable for use in high spore concentrations, and in circumstances when an accurate time differentiation between samples is required. It is unsuitable for continuous operation.
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