Accession to mortgaged property.- If,
after the date of a mortgage, any accession
is made to the mortgaged property, the mortgagee,
in the absence of a contract to the contrary,
shall, for the purposes of the security, be
entitled to such accession.
(a) A mortgages to B a certain
field bordering on a river. The field is increased
by alluvion. For the purposes of his security,
B is entitled to the increase.
(b) A mortgages a certain
plot of building land to B and afterwards erects
a house on the plot. For the purposes of his
security, B is entitled to the house as well
as the plot.