April, ’89.] history society op' Wisconsin. 
205 
was removed and the remainder with adhering NaCl put 
in water and the Na estimated by standard acid solution. 
When a piece of the alloy was thrown into water the 
action was very energetic, and when the alloy was exposed 
to the air it rapidly oxidized and absorbed moisture from 
the air and became very warm. The bottom of the crucible 
was protected from excessive heat and the alloy produced 
no perceptible action upon it. The total amount of Na as 
sodium hydroxide was 165 gms. corresponding to 96 gms. 
of the metal Na. The theoretical amount of Na deposited 
in two hours with 72 amperes is about 122 gms. The tin 
alloy formed a solid mass of one-half inch in thickness 
and 4.5 inches in diameter. It had a fibrous or stri¬ 
ated character in a vertical direction nearly’ or quite as 
soft as pure Na, and when freshly cut resembled Na some¬ 
what in appearance, having a steel gray or ash color. It 
easily ignited spontaneously in the air, and when thrown 
upon water the energy was so great that combustion of 
the liberated hydrogen took place. In these rich alloy’s the 
kb and Sn were found at the bottom of the vessel of 
water, in a finely divided state, after the Na had entirely 
united with the water. There was about 90 gms. of Na 
alloyed with the Sn. Some of this alloy was preserved 
under paraffin for more than a year with only slight oxi¬ 
dation of the Na upon its surface. These alloys reduce A1 
from cryolite or the chloride of A1 though the Na does 
not entirely leave the Pb and considerable Na vapor 
passes off from the melted cryolite. 
Experiment 2. This experiment was repeated under 
the same conditions, using 2 pounds cry r olite mixed ^ith 
of NaCl in each crucible. About the same amount o 
Eb and Sn alloy of Na was obtained, together with a 
considerable number of small globules of comparatix e y 
Pure Al. I collected the globules formed on the surface o 
the Pb alloy r , and after re-melting first under NaCl^t ien 
m the air, a single globule was obtained weighing 
