356 KRETZ. 



the point in question. It seems, however, that proper mo- 

 tion is not used. Cf. Introd., pp. 15-17. 



(15) The same notes apply to this catalogue as to no. 

 (11), except in the case of N. A. stars, when the proper mo- 

 tion is taken into account. See Introd., p. iv ; also Twelve- 

 Year Catalogue, pp. vii and ix, and Seven-Year Catalogue for 

 i860, pp. fvi| and fxj, and Appendix. 



(16) No statement is made in the introduction to Vol. 

 VIII of the "Observations de Poulkova," which contains the 

 catalogue. Backlund, however, in an article designed origin- 

 ally to form the preface to the catalogue, but afterwards pub- 

 lished in the Memoirs of the St. Petersburg Imperial Acad- 

 emy, states, that proper motion was used when given either 

 by Auwers in his ''Bradley " or by Argelander in his "2^0 

 Stars ivitli Proper Motions y Backlund superintended most 

 of the computations. Loc. cit.. Vol. 34, no. 7, p. 4. 



(17) Proper motion seems to be neglected. No mention 

 of this matter is made in the introduction. 



^ "i Proper motion is used in the reductions. See Intro- 

 duction, pp. {vi| and |x . 



(19) See (26). 



(20), (21) Both catalogues neglect proper motion. See 

 (20) Introd., p. XXIV ; (21) Introd., p. xii. 



(22) See the remarks on this catalogue in Sec. I of the 

 present paper. 



(23) Proper motion is used. See Introd., p. 4. 



(24) This catalogue does not take account of proper mo- 

 tion. Cf. Introd., p. ix. 



(25) The proper motion as given is included in the reduc- 

 tions. See Introd., p. (12). 



(26), (12), and (19) According to p. [2] of Vol. I, proper 

 motion is always neglected. 



(27) Account is taken of the proper motion whenever 

 given. Introd., p. vi. 



(28) Proper motion is included in the annual variation for 

 each star given in this catalogue. Its value, although not 

 set down, may be obtained by subtracting the corresponding 



(16) 



