Miscellaneous Intelligence. 203 



in colorless to rose-red or yellow crystal and cleavage fragments : 

 the faces c, r and /were identified and the angles found to agree 

 with the measurements of Penfield. The specific gravity is 3*254 

 to 3*281. A qualitative examination by Florence proved the 

 Brazilian mineral to be a hydrophosphate of aluminium and 

 strontium without barium or fluorine, but probably containing a 

 small amount (2 p. c.) of alkalies. — Ann. Nat. Ilof museums, xix,, 

 93, 1904. 



III. Miscellaneous Scientific Intelligence. 



1. Publications of the Yale Observatory. — The Yale Observa- 

 tory has recently issued a Report of the Director, Dr. W. L. 

 Elkin, for the years 1900-1904. In regard to the work of 1903- 

 1904, he states : "During the past year the heliometer has been 

 in active operation, Dr. Chase having devoted himself with great 

 energy and self-sacrifice to the completion of the stellar parallax 

 research we have been engaged upon for the past ten years. This 

 now may be said to have finally reached a point where the obser- 

 vations may be suspended and our energies entirely given to their 

 reduction. Mr. Smith has completed the new series on the 

 parallax of Arcturus and has begun a series on the parallax of 

 the Pleiades. 



The meteor apparatus was put in use during the November 

 epoch and a few trails secured. Dr. Max Wolf of Heidelberg, 

 Germany, has kindly forwarded to us his meteor photographic 

 trails of the Perseid epoch and those which seem to be true Per- 

 seids have been measured by Miss Palmer. Miss Palmer and 

 Miss Newton are still employed on the index catalogue to the 

 Bonn Durchmusterung. The time service has been maintained 

 efficiently by Messrs. Chase and Smith." 



The concluding portion of Volume I of the Transactions has 

 also been published. This includes the Preface and Parts VII 

 and VIII, pp. 335-390. These parts are devoted to a Revision of 

 the first Yale triangulation of the principal stars in the group of 

 the Pleiades by Dr. W. L. Elkin ; and a second Determination of 

 the relative position of the principal stars in the group of the 

 Pleiades by Mason F. Smith. 



2. Publications of the Yerkes Observatory, Vol. II, 1903. 

 Chicago, 1904 (University of Chicago Press). — This volume, 

 also issued as Vol. VIII of the first Series of the Decennial Publi- 

 cations of the University, contains a series of seven articles, on 

 work done at the Yerkes Observatory ; their titles are as follows: 

 Measures of double stars in 1900 and 1901, by S. W. Burnham ; 

 micrometrical observations of Eros during the opposition of 1900— 

 1901, by E. E. Barnard ; recent rigorous methods of treating 

 problems in celestial mechanics, by F. R. Moulton ; radial veloci- 

 ties of twenty stars having spectra of the Orion type, by E. B. 

 Frost'; spectra of stars of Secchi's 4th type, by G. E. Hale, F. 

 Ellerman and J. A. Parkhurst ; astronomical photography with 



