1920.] 
Reviews and Abstracts. 
127 
being facilitated by plotting the London figures not for the actual months 
but for the corresponding New Zealand months —the July figures for 
January, and so on. 
Jan. Feb. Mar. Apl. May June July Aug. Sept. Oct. Nov. Dec • 
The cause of the marked fluctuations in the curves for 1917 is at present 
unexplained. The monthly meteorological records do not furnish any 
evidence that the variation in the quality of the milk was due to sudden 
changes in the weather. 
The figures for 1917 and 1918 indicate that the best milk is obtained 
in the autumn, and the poorest in the early spring C. A. C. 
•*> 
Titaniferous Ironsands of New Zealand. Paper read by Y. W. Aubel, 
Assistant Blast-furnace Superintendent of the Clairton Works of the 
Carnegie Steel Company, at the September, 1919, meeting of the 
American Institute of Mining and Metallurgical Engineers. 
This paper opens with a rather crude account of the location and extent 
of the ironsand deposit (the accompanying map is delicious), and touches 
somewhat sketchily the history of the attempts to work them. The most 
interesting statement is the smug conclusion that “ the operations of some 
of these wild-cat companies have caused considerable prejudice against 
this material.'’ The author then proceeds (Absit omen!) to deal with the 
latest attempts by the New Zealand Iron-ore Smelting and Manufacturing 
Company of 1914-19. The ferro-coke process is dismissed with righteous 
scorn: “ The iron produced was very inferior. Such a process has little 
to recommend it from a metallurgical point of view, and it is not surprising 
that it was abandoned.” The later attempts to smelt in a hot-blast furnace 
are treated more sympathetically, as might be expected from Clairton, Pa. 
The absence of free ilmenite is pointed out, with the consequent im¬ 
possibility of separating the titanium by magnetic or other concentration, 
and the experiments and analyses quoted seem conclusive on this point. 
