April, ’89.] history society of Wisconsin. 
203 
allovs of these metals with A1 will be formed or the A1 
set free. 
A large portion of the Na (or K) can be recovered from 
these various alloys by distillation in an iron crucible. They 
can be heated to*a higher temperature than pure Na, or 
K. in acid crucibles without the Na, or K attaching the 
crucible. One part of Na added to 9 parts of Pb. and 
melted under paraffin forms an alloy (Na Pb probably) 
which still retains much of the appearance of the Pb., 
though harder and more brittle, and when placed in water 
acts very slowly upon it. 
One part of Na to 4.5 parts ol Pb (Na 2 Pd) gives a 
brittle, almost granular alloy, having a blue black coloi, 
and acts quite rapidly upon water. 
One part of Na to 2.25 parts of Pb (Na 4 Pb), lorms a 
dark blue iridescent alloy, quite compact, with a smooth 
cleavage,and acts very rapidly when thrown upon water. 
One part of Na to 1.5/6 Pb is less homogenous than 
the preceding alloys, and cuts with a knife like Na. 
One part of Na melted with 14 paits ot Sn under 
paraffin, gives an allo}^ that is not homogenous, vhic is 
of a blue black color on the top of the mass and of a hare 
metallic, somewhat brittle, character on the bottom, 
forming two distinct alloys. 
One part of Na to 6 parts of Sn, melted under paraffin, 
gives a more homogenous alloy than the first die o a 
darkish, compact character, not very brittle. 
One part of Na to 3 parts of Sn gives a homogenous 
mass of blue black color, melting at a point just ao 
the boiling point of paraffin anel considerably aiove 
of pure Sn. . ,, r 
One part of Na to 1 part ot Sn gives a granu ar 
that melts at about the melting point of bn ^ 1 
thrown.upon the water the Na unites with consiee 
energy with the water. 
