CAT NO: DIDACTICNLE-Export-138023
Comprising of a tubular column the upper end of
which is closed with a perforated lid. The perforation is provided with a
tube connected to vacuum cleaner. A special type funnel is provided at
the lower end of the column. A flexible tube is inserted in the column.
On switching on the vacuum cleaner. the air is sucked in the column from
funnel stem and the flexible tube. The eggs mixed with scales are
sucked in the column through flexible tube. The scales being lighter are
lifted and sucked into the vacuum cleaner while the eggs being heavier
do not reach upto the upper reaches of the column hence fall down when
the vacuum cleaner is switched off..