this admirable invention, which were lent to the Society by the
Navy Board. They consist of eight separate machines, which work in
succession, so as to begin and finish off a two-sheaved block four
inches in length. These were put by Messrs. Maudsley and Field's men
(who made them) into such communication and action, as to perform the
set of operations in the most perfect manner.

Mr. F. briefly stated that the Block Machinery of Portsmouth, by
adjustments, could manufacture blocks of 100 different sizes--could
with thirty men make 100 per hour; and from the time of its completion
in 1804-5 to the present day, had required no repairs from Maudsley,
the original manufacturer. The total cost was given at 46,000 _l_.,
and the saving per annum in time of war 25,000 _l_. This is a paragon
of art which we could see again and again.


_Enameled Street Names._

The names of the Streets in Paris have been recently put up on
enameled plates; the ground being blue, and the letters white. The
substance on which the enameling is performed is lava in slabs; the
same substance has since been used as the basis of certain enameled
designs; it is much superior in some points to porcelain in this
application, because the necessary exposure to fire does not cause it
to crack in the manner that porcelain does.--_From the French_.


_Preservation of Wine Must._

Charcoal was added to grape must, in the proportion of 100 grains to a