perature-concentration diagram for the system carbon and iron. I'laces in the diagram are found for graphite, tnartensite, cementite, ferrite, and pearlite, while austenite is discussed Of course, few, if any, of the points are known with accuracy ; but the author's scheme is a very plausihle one and will serve as a useful guide to further investigation. even though certain points should prove to need modification. The paper affords another instance of the extreme value of the phase rule, a deliionstration which is the inore necessary wlien we notice that phase rule investigations do not appear as physical chemistry in the 1v.n.R. last Jnhrbiich der Cheitzie. Compounds of metals with one another. 21'. A-urnakoff. Jour. Rtrss. Sot. - The melting-points of a considerable nuniher of sodiuni and potassium amalgams of varying composition as well as those of some alloys or sodiuni with either cadmium, lead or bismuth were determined and compared. Sotliing especially novel is brought out, and the whole paper is of a prelitninary character. E. z, .
31, ' 7 ~ 7i r S 9 9 ) .
c.
The distillation of liquid air and the composition of the gaseous and liquid 4 9 , 5 r 7 ( r p o o ) .- The author has tlephases, I. E . C. E , h'nlj,. Phil, AIIng.[j] termined the boiliug-point curve for oxygen aiid nitrogen at atmosplieric pressure, and also the compositions of the coexistent phases. IVhen the logarithnis of the ratios of the constituents of the liquid and the vapor phases are plotted as abscissas and ordinates respectively. the resulting curve is a straight line. M'. ZI. R. Properties of liquid mixtures, 111. R. A. Lehfeldt. P h i / , .?Zng. [j]47, 2S,+( r j y y 1 . --.lddition of large amounts of phenol to water a t temperatures above 70" causes little or no cliangi in the vapor-pressure The vapor-pressure of the ditieric systeni, aniline anti water, can be calculated approximately on the asstiniption that water produces a nornial depression in aniline, and aniline a nornial depression in water. -1concentratioti-teinperatiire cliaprani for phenol aiid water is given, and it is s h o ~ m that the cryohpdric temperature c?an be calculated approximately h!- nieaiis of the van ' t Hoff formula. 1[7, 8.
n
The compounds of boron and silicon, SiB.; and SiB,,. N..lZoi.s.snu t r r r d ,-I. Stol-k. f?er. i./if?/z. (;e.
