STELLAR PnOTOGRAHIY. 



LM9 



by less than a tenth of a magnitude. It is doubtful if 

 be attained by any other photometric process hitherto 



i 



degree of accuracy can 

 ployed. In no case does 



dual exceed th 



of a magnitude, and 



u res of the same star differ ft 



nly 



the 



nicas- 



one 



i>y 



much as six tout lis 



r 



magnitude 



The 



g 



por 



of these stars are too faint to be contained 



in 



rung as belonging- to this 



existing catalogues. Their positions have not yet been determined from the photo- 

 graphs. A full publication of their magnitudes does not therefore Beera desirable 

 in the present Memoir. As examples, the 38 stars enumerated in the Durchmuste- 



region have been selected from the entire list of 117 

 stars, and their measurements are given in Table VI. The successive columns give 

 the Durchmusterung numbers, the photographic brightness of the trail, and the 

 residuals from the mean expressed in tenths of a magnitude, m ative residuals 



by Italics. In order to make the magnitudes correspond with 

 of equatorial stars giving trails of equal intensity, each of the original read- 



being indicated 



those 



ings has been diminished 



by three magnitudes. 



formu 



By means of Table II. and the 



given on page 190, a 



h 



be 



pplied for the d 



of 



TABLE VI. 



No. 



Trail. 



Resid. 



Magn. 



DM. 



Res. 



No. 



Trail. 



Rcsid. 



Ma sn. 



DM. 



Kes. 



1 



4.00 



120 



10.1 



9.5 



5 



20 



6.30 



112 



11.0 



9.5 



4 



2 



5.60 



010 



10.2 



9.2 



2 



21 



4.00 



000 



8.8 



8.8 



4 



3 



3.53 



032 



9.0 



8.8 



2 



22 



5.03 



2 20 



9.3 



8.7 



5 



4 



5.20 



112 



10.4 



9.4 







23 



6.00 



000 



10.9 



9.4 



5 



5 



6.40 



201 



11.3 



9.5 



— 



24 



6.50 



000 



11.3 



9.5 



7 



1 



6.40 



201 



11.3 



_ 



25 



3.93 



001 



9.1 



9.0 



5 



6 



5.63 



032 



10.2 



9.4 



2 



26 



4.87 



020 



10.9 



9.a 1 



5 



7 



4.77 



520 



9.4 



9.3 



8 



27 



6.27 



212 



10.6 



9.5 







8 



6.70 



210 



11.5 



9.5 



9 



28 



5.17 



2/2 



0.7 



8.7 



7 



9 



4.93 



121 



10.0 



9.1 



2 



29 



4.27 



502 



9.9 



9.4 



5 



10 



5.80 



210 



10.3 



9.5 



3 



30 



5.43 



202 



10.0 



9.3 



2 



11 



6.03 



010 



10.4 



1 9.5 



2 



31 



5.57 



210 



11.2 



9.5 



6 



12 



4.70 



210 



10.0 



9.1 



2 



32 



5.70 



202 



10.4 



9.5 



2 



13 



2.77 



511 



7.1 



7.0 



1 



33 



4.93 



302 



1 0. 1 



9.5 



5 



14 



6.27 



020 



10.6 



9.5 







34 



5.60 



202 



10.4 



9.3 



2 



15 



5.47 



212 



9.8 



9.2 



2 



35 



4.67 



101 



10.8 



9.3 



6 1 



16 



6.13 



010 



11.1 



9.5 



6 



36 



4.27 



502 



9.8 



9.5 



8 



17 



4.23 



220 



9.1 



9.0 



5 



37 



3.93 



111 



11.0 



9.3 



8 1 



18 



4.33 



513 



9.6 



8.9 



2 



38 



4.77 



020 



9.4 



9.0 



2 



19 



5.77 



122 



10.7 



9.5 



1 















