I cumulated the changes in this order: http://code.google.com/p/pharo/issues/list?id=874 PharoInbox/SLICE-Mantis6985-Issue874-Integer-bitAt-nice.1 add Integer #bitAt: http://code.google.com/p/pharo/issues/list?id=875 PharoIbox/SLICE-Mantis6601-Issue875-Float-hash-nice.1 fix Float hash http://code.google.com/p/pharo/issues/list?id=876 PharoInbox/SLICE-Mantis3374-Issue876-Arithmetic-Equality-transitive-Part1-nice.1 PharoInbox/SLICE-Mantis3374-Issue876-Arithmetic-Equality-transitive-Part2-nice.1 fix number equal transitivity (and further change Fraction hash) http://code.google.com/p/pharo/issues/detail?id=681 PharoInbox/SLICE-Mantis6982-Issue681-Number-readFrom-nice.1 connect SqNumberParser in Number readFrom: (with backward compatibility) http://code.google.com/p/pharo/issues/list?id=879 PharoInbox/SLICE-Issue879-ANSI-FloatCharacterization-nice.1 add ANSI Float Characterization Please review :) Nicolas