204 
PROCEEDINGS OF THE NATURAL [APRIL, ’89. 
One part of Na to 0.5 parts of Sn gives an alloy that 
cuts like Na and resembles it in appearance, and when 
thrown upon water the Na unites with so much energy 
that the liberated H ignites and the black powder of Sn 
falls to the bottom. 
In a future paper I shall hope to give some of the physi¬ 
cal and chemical properties of these alloys with varying 
amounts of Na and K. 
In the following will be found a few typical experiments 
incidentally illustrating the preparation of a few of these 
alloys by r electrolysis and especially the preparation of A1 
and its alloys. In a large portion of this work a 40 volt 
00 ampere dynamo machine was employed, and Ayrton 
and Perry s instruments for measuring volts and amperes 
were used. 
The following experiment illustrates 
Pb. and Sn. alloys: 
Expemment 1. A current averaging 72 amperes and 
volts was passed through melted NaCl contained in 
"° °' -^ or g a fl crucibles, arranged in series, for 
vo ours. Each crucible contained 30 pounds of the 
. n the bottom of the first crucible was placed 104 
? n ’ and second 470 gms. of Pb, each serv- 
tol aS f It e ' COnnection being made through the bot- 
1™° CrUClble ' A car bon anode passed through the 
of the U CrUClblC aUd CXtended to within three inches 
ot the molten metal cathode. 
c ° nt f n ” g the Sn “ ares * 
tial differ? COnS ailt ■' ,lotter> an{i had an average poten- 
nt, a a ?r ‘ he " ectr0des ° f 12 volts, wlfc that 
two Cr! Pb 21 volts A, the end of 
to cool and craeibffs'f.iffe' remove d, ‘lie liquid allowed 
was of an ii- *h vLn open. The Pb allov formed, 
Stated on cast and qaiclK 
and « brittle. About 
