--- a/MeasurementValue.st	Sun Dec 01 05:26:53 2019 +0100
+++ b/MeasurementValue.st	Sun Dec 01 05:27:11 2019 +0100
@@ -140,6 +140,14 @@
     "Modified (comment): / 01-07-2017 / 19:28:32 / cg"
 ! !
 
+!MeasurementValue class methodsFor:'coercing & converting'!
+
+coerce:aNumber
+    "convert the argument aNumber into an instance of the receiver's class and return it."
+
+    ^ MeasurementValue value:aNumber minValue:aNumber maxValue:aNumber
+! !
+
 !MeasurementValue class methodsFor:'constants'!
 
 unity