ASTRONOMY. 377 



on an entirely new reduction quite independent of Bessel's. The cata- 

 logue is in tLe zone form, and apparently the zero points of the zones 

 are to be made to depend on new observations at Konigsberg. 



Catalogue of Stars occurring in the Astr. Nach. — Dr. N. M. Kam, at one 

 time assistant at the Leyden Observatory, has formed a catalogue of all 

 the comparison stars which are contained in the first CO volumes of the 

 Astronom ische Nachrichtcn. 



It consists of three parts. Part I gives the mean places for 1855 of all 

 stare for which complete observations are published (4,890 numbers). 

 Part II gives places which depend on independent meridian observations 

 combined with places from catalogues (240 numbers). Part III contains 

 stars observed in one co-ordinate only. Accurate precessions, with sec- 

 ular variations, epoch of observation, and observer, are also given. It 

 appears from A. N~. No. 2548 that the ]\IS. is deposited at the Leyden 

 Observatory. 



Resulmdos del Observatorio National Argentino en Cordoba, B. A. Gould. 

 vol. ii, Observations del Aiio 1872 (Buenos Aires, 18S2, lxxviii, and 

 296 pp. 4to). — The greater part of this splendid volume is taken up by 

 the first installment of the zone observations which were commenced at 

 Cordoba on September 9, 1872, and closed on August 9, 1875, during 

 which time about 105,000 single observations were made. Of these the 

 present volume contains about 13,00<). The zones comprise the part of 

 the heavens between 23° and 80° south declination, and as a security 

 against constant errors the plan inclnded the formation of a more accu- 

 rate catalogue, containing a number of stars from each zone observed 

 three or four times each with all possible care. The meridian circle was 

 constructed by Kepsold ; it has a telescope of 122 mm , and a circle of 

 71G mm diameter, graduated to 4'. All the constants of the instrument 

 have been investigated, and the results are all given in the introduction. 

 The right ascensions of all the stars observed at Cordoba depend upon 

 those of the United Stares Coast Survey Catalogue of Fundamental 

 Stars (2d ed., 18G6) 7 with a few slight modifications; the declinations 

 are deduced from nadir observations, the latitude being assumed equal 

 to — 31° 25' 15".0. The zones were 2° in width as far as 47° declination, 

 thence increasing gradually with the declination ; they were generally 

 one hundied minutes long. The transits were always observed by Dr. 

 Gould, generally over three wires, and were registered on a chronograph, 

 while an assistant read off one microscope, which was compared with 

 the other three at the beginning and end of the zone. Four hundred 

 and ten catalogue and time stars were observed in 1S72, and the sepa- 

 rate and mean results for 1875.0 are given. To this epoch the zone stars 

 are also reduced, and as there is an index to the zones observed in 1872 

 at the end of the volume it is very simple to fiud any star required. — 

 {Copernicus, February, 1883,) 



Uranometria Argentina. — The following alphabetical index to the con- 



