360 KRETZ. 



Cambridge Animals (31). — Observations in right ascension 

 of my stars were taken in the years 1842, '44, '45 and '47. 

 Corrections to the years 1842 and 1845 were obtained by di- 

 rect comparison with Struve's " Positiones Mediae." During 

 1 844 and 1 847 not enough stars were observed in the zone 

 selected by me to warrant a comparison with Struve. For 

 1844 I accordingly assumed the same corrections as for 1845, 

 and for 1847, zero was used, as no other value was procurable. 

 Corrections to the declinations are given by Boss. My inves- 

 tigations give, for the right ascensions : 



A. G. C. — Cambridge 1842 ^ — 0^075 

 A. G. C. — Cambridge 1845 = + o'-i47 



Edinburgh Annuals (32). — Boss, who gives corrections to the 

 declinations, divides this series into several groups, of which 

 the following include the dates of observation of my stars : 

 1 8 54- 1 860, 1 86 1- 1 864, 1 865-1 869. Corrections were com- 

 puted by comparison with the A. G. C. for the years 1856, 

 1864, and 1868, being one year in each group. Two stars were 

 observed in 1842, and for this year a correction was deduced 

 by comparison with the new Seven- Year Catalogue. The re- 

 ductions were always made including proper motion if possible. 

 The values found were as follows : 



A. G. C— Edinb. 1842 — — o«.oi2 

 A. G. C— Edinb. 1856 = — 0^087 

 A. G. C— Edinb. 1864 = — 0^070 

 A. G. C— Edinb. 1868 = — 0^042 



Radcliffc A?inuals (33). — Corrections to the declinations ob- 

 served before 1874 are given by Boss. One of my stars was 

 found in the volume for 1874. The correction in this case was 

 calculated by extrapolation from 1872 and 1873. For the 

 right ascensions the usual method was followed, comparisons 

 being made both with the A. G. C. and with the Paris 1875. 

 Corrections to the observations of the years 1868, 1870 and 

 1 87 1 were thus obtained. In the year 1873 not sufficient stars 

 were observed to make a satisfactory comparison possible. For 



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