Sand timer

GPTKB entity

Statements (28)
Predicate Object
gptkbp:instanceOf Timekeeping device
gptkbp:alsoKnownAs gptkb:Sandglass
gptkb:Hourglass
gptkb:Sand_clock
gptkbp:component Narrow neck
Sand or fine granular material
Two glass bulbs
gptkbp:depictedIn gptkb:art
gptkb:literature
gptkbp:durationMeasured Fixed time interval
https://www.w3.org/2000/01/rdf-schema#label Sand timer
gptkbp:material gptkb:glass
wood
Metal
Sand
gptkbp:operates Sand flows from upper bulb to lower bulb
gptkbp:originatedIn Ancient times
gptkbp:popularFor Medieval Europe
gptkbp:replacedBy gptkb:Mechanical_clocks
Electronic timers
gptkbp:symbolizes Mortality
Passage of time
gptkbp:usedFor Measuring time intervals
gptkbp:usedIn Education
Games
Cooking
gptkbp:bfsParent gptkb:Sandglass
gptkbp:bfsLayer 6