formerly observed--Those practised at the present day--Marriages
--Contrast they present.

LETTER LXIII.
Public Libraries--_Bibliotheque Nationale_--Its acquisitions since
the revolution--School for Oriental Living Languages.

LETTER LXIV.
_Bibliotheque Mazarine_--_Bibliotheque du Pantheon_--_Bibliotheque de
l'Arsenal_--The Arsenal--Other libraries and literary _depots_ in
Paris.

LETTER LXV.
Dancing--Nomenclature of caperers in Paris, from the wealthiest
classes down to the poorest--Beggars form the last link of the chain.

LETTER LXVI.
_Bureau des Longitudes_--Is on a more extensive scale than the Board
of Longitude in England--National Observatory--Subterraneous quarries
that have furnished the stone with which most of the houses in Paris
are constructed--Measures taken to prevent the buildings in Paris
from being swallowed up in these extensive labyrinths--Present state
of the Observatory--_Lalande_, _Mechain_, and _Bouvard_--_Carroche_,
and _Lenoir_--_Lavoisier_, and _Borda_--_Delambre_, _Laplace_,
_Burckhardt_, _Vidal_, _Biot_, and _Puisson_--New French weights and
measures--Concise account of the operations employed in measuring an
arc of the terrestrial meridian--Table of the new French measures and
weights--Their correspondence with the old, and also with those of
England.