68 
MESSRS. C. T. HEYCOCK AND F. H. NEVILLE ON 
that is, from AggSb^. It would require the existence of a good deal of impurity in 
the antimony to make AggSbo the eutectic point. 
The series, Table VIIIb., in which silver was added to antimony, gives us the same 
eutectic point, namely, 41'5 atomic per cents, of antimony. 
The short line, starting from the eutectic point and ending at 53 atoms of 
antimony, was obtained with commercial antimony, so that the fact that it lies below 
the rest of the curve needs no comment. 
The temperature 629'49° which we obtained as the freezing or melting point of 
antimony is almost identical vdth the number 629'5 4° that we obtained wdth quite 
dilferent thermometers a year before (‘Chem. Soc. Jour.,’ 1895, p. 195). The same 
sample of antimony was used in both cases, and in our earlier work we noticed that 
this antimony beliaved at its fi’eezing point in the way peculiar to a pure substance. 
We think it is almost time for the text-books of chemistry to abandon the statement 
that antimony melts at 440°. 
Incomplete Curves. 
In fig. 11, the line beginning at B above the silver-antimony curve, gives the 
result of adding bismuth, up to 19 atomic per cents., to silver. This promises to 
closely resemble the silver-antimony curve, and we regret that 'want of time has 
prevented us from completing it. 
In fig. 20 we give the bismuth-copper curve, which, if completed, would almost 
certainly resemble that of lead-copper. 
Fig. 12 is the curve of gold-copper. 
Fig. 13, the curve of thallium added to silver, is, so far as it goes, very straight, 
like the early part of the lead-silver curve. 
The remaining metallic pairs that we have examined require further experiment, 
we therefore do not give tables for them ; but the curves enable the numerical results 
to be read off with sufficient accuracy. 
From figs. 14, 15, 16, 17 it will be seen that the first result of adding iron or nickel 
to copper, or of adding gold or platinum to silver, is to raise the freezing point. In 
one case only, that of iron added to copper, did we reach the higher limit of this rise ; 
it will be seen from fig 14 that after 3 atoms of iron a further addition produces no 
(iffect on the freezing point, so that a flat occurs in the curve ; we have noticed several 
similar cases, where zinc is the solvent metal. In these cases of rise in the freezing 
point we hardly think it would be profitable, until the whole curve has been traced, 
to attempt to distinguish between the phenomena of the separation of isomorphous 
mixtures, solid solutions or compounds. 
In figs. 18 and 19 we give the curves for dilute solutions of aluminium in silver and 
in copper. We have traced these curves further, finding, as Le Chateliejr. had 
previously found, an intermediate summit at AlCug, and probably also at AlAgq; but 
