Propolis: a glue or resin-like product elaborated by bees to serve as a cement in cases where wax is not sufficiently tenacious. [Please select]
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They only introduce propolis when they want it for the execution of repairs, or for some other special purpose. [Please select]
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Finally when every crack has been carefully looked over, filled up and covered with propolis, they begin to varnish the whole of the interior sides. [Please select]
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When the full combs have become too heavy, they strengthen the walls of the uppermost or bearing cells by thickening them with wax and propolis. [Please select]
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