_Errors in the Date of Printed Books._--In the title-page of Peter Heylin's
_Microcosmos_, 8th ed., the date is printed 1939 instead of 1639. In like
manner, in _Historical Applications and occasional Meditations upon several
Subjects, written by a Person of Honour_, printed in 1670, the imprimatur,
signed "Sam. Parker," is dated 1970, instead of 1670. In each of these
cases the error is evidently caused by the compositor having inverted the
figure 6, which thus became 9.