Abstract
In order to prevent snow from freezing to the sampling tubes it has, for many years, been customary to shellac the tubes. Apparently it has been general practice, at least in the Sierra Nevada region, to use only white shellac for this purpose.I followed this practice until one season I was unable to obtain white shellac and was compelled to substitute orange. I found that it worked equally well and showed better on the tube, making it much easier to determine when a thorough job had been done. It has been our experience that, under certain weather‐conditions, even a small spot that is not properly coated will cause plugging of the sampler.
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