July 17, 1891.] 



SCIENCE. 



41 



telephones and the auxiliary apparatus, by F. C. AUsop; and 

 " Practical work in Organic Chemistry," by Fredk. Wm. Streat- 

 feild, with a prefactory notice by Professor R. Meldola. 



— An ephemeris for the use of members of the astronomical 

 department of the Brooklyn Institute. July to December. 1891, 

 prepared by the executive committee of the department, has just 

 been issued by the Institute. Garrett P. Serviss, president of the 

 department, says that the purpose of the ephemeris is to present 

 in a convenient and readily accessible form information about 

 variable stars, meteors, occultations, and other phenomena, with 

 the hope that many may be induced to undertake observations 

 which will certainly prove to be interesting to the obsei-vers, and 

 cannot fail to be valuable to the department by giving a definite 

 direction to the efforts of its members. The greatest charm of the 

 starry heavens is felt only by those who study them systematic- 

 ally, but for that purpose an observatory, and even a telescope, is 



not essential. With an opera-glass, and with the naked eye, 

 many o£ the most interesting phenomena of the sky may be satis- 

 factorily and usefully observed. Arrangements have been made 

 to furnish special information and assistance to observers at the 

 meetings of the department, which will be resumed in October, 

 and in the meantime members are requested to observe, in any 

 way that may suit their convenience, the phenomena to which 

 attention is called in the ephemeris. and to make notes of their 

 observations. The president of the department will be particularly 

 obliged if members will, at their earliest convenience, inform him, 

 by letter or otherwise, of their intention to undertake any of the 

 observations recommended. Any request for additional informa- 

 tion or advice will meet with prompt attention. It is intended to 

 make the department of astronomy one of the foremost in the 

 Brooklyn Institute, both in the attractiveness of its meetings and 

 in its general influence, and every member who undertakes any of 

 these observations will give material assistance to that end. 



Ediausiion 



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