xxvi GENERAL SUMMARY OF SCIENTIFIC AND 



catalogue of 4000 stars is preparing. The Observatory of Brussels 

 is preparing a catalogue of 12,000 stars. Safford has prepared a new 

 catalogue of Standard Declinations for the Engineer Department. 



Burnham's catalogue of (about) 10,000 double stars has long been 

 ready for the press ; but is temporarily delayed, and will be printed 

 in 1877. 



Boss, of Albany, is preparing for the U. S. Northern Boundary Com- 

 mission a catalogue of 490 stars, which will give standard positions. 

 All trustworthy observations of each star (including Bradley's) have 

 been used and rigorously discussed. 



Stone, of Cincinnati, publishes a catalogue of 50 new double stars. 



Schonfeld's second catalogue of 143 variable stars has appeared 

 during the year. 



MISCELLANEOUS. 



"We note the establishment during the year of Konigsberger's Ee- 

 2oertorium der Eeinen unci Angewandten 3fatJiematik, under the editor- 

 ship of Dr. Leo Konigsberger and Dr. Gustav Zeuner, of Dresden. 

 This periodical will have the novel feature of abstracts of works on 

 Astronomy, Geodesy, Mathematical Physics, etc., by the authors of 

 the works themselves. The Analyst of Professor Hendricks, at present 

 our only mathematical journal, continues to maintain its position. 



It is understood that a mathematical journal is j^roposed to be 

 published by the Johns-Hopkins University, under the experienced 

 editorship of Professor J. J. Sylvester. 



The publication of a selection of the works of Bessel, by Dr. Engel- 

 mann, of Leipzig, deserves a special mention. A similar compilation 

 for the works of the elder Herschel is much to be desired. 



The opening of the Loan Collection of Scientific Apparatus at Lon- 

 don has been an event of great importance during the year. The 

 special features are described in detail in another place. The as- 

 tronomical instruments of the Centennial Exposition were mostly of 

 the ordinary constructions, and, although exhibiting well the present 

 j)ractice of field astronomy and geodesy, presented few novel feat- 

 ures. A good exhibition of optical glass was made by Fell, of Paris, 

 and Chauce, of Birmingham. The calculating-engine of Mr, George 

 Grant, of Boston, and some special optical apparatus and material, 

 were particularly noteworthy. 



A series of astronomical drawings exhibited by Trouvelot, of Cam- 

 bridge, was especially interesting, on account of the great facilities 

 at the artist's command for viewing the objects represented, most of 

 them having been examined with the Harvard College refractor (15 

 inches). 



The progress of the zone observations undertaken by the German 

 Astronomical Society, one of the most important works of the de- 

 cade, will be found described in another place. 



