October, 1906.] 



KNOWLEDGE & SCIENTIFIC NEWS. 



557 



MAGNITUDE 1-51 



a Andromedas 



j3 Cassiopeite.. 



a Cassiopeia. . 



y Cassiopeia". . 



^ Andromedfe 



a Ursse Minoris 



a Arietis 



p Persei 



a Persei 



fi Tauri 



^ Aurigse 



a Geminorum 



y Leonis 



p Ursre Maior-s 



a Urste Maj .ris 



B Leonis 



e Urste Majoris 



^Ursffi Majnris 



7) Urise Maioiis 



fi Ursce Minoris 



V Draoonis . . 



23 Stars average 



2-15 A 



'z-42 P5a 



2-47 K 



2-25 B 



2-37 Ma 



212 F8G 



2-2;! K2\I 



2-31 B8A 



1-90 F50 



1-78 B8A 



207 A Pec 



1-58 A 



2-30 K 



2-44 A 

 1-95 K 



2'23 A2F 



1-68 A 



2 09 A 



1-91 B3A 



2-24 K6M 



2-42 K5M 



2-32 F8G 



216 B6A 



2-50. 



, Light 



'■ Years. 



65-2 



•♦ 32-B 



9iV5 



? 460-0 



35-4 



44 



40-7 



67 



61-7 

 54-3 

 ' 16-4 



Hyp. Sun Mas 

 Dia. Power. 

 5,630,000 43 

 3,003,000 11-5 

 8,030,000 87 



45,200,000 2725 

 3.260,000 14-2 

 4,630,000 27-5 

 4,000,000 21-3 

 6,750,000 102 

 6,110,000 35 

 6.200,000 51 

 5,630,000 42 

 2,160,C0O 6-25 



13.900,000 259 



17,300,000 400 

 7,8,0,000 81 



11,000,000 162 



24,740,000 815 



20.530,000 562 

 3,900,000 20-25 



14,700,000 £89 

 5.640,1)00 43 

 3,039,000 12-3 



15,079,000 303 



268 



M.AGNITUDE 2-51 lo 3-60. 



14 Stars average . . 



MAGNITUDE 3-51 to 4-£;0. 



17 Stars average 



MAGNITUDE 4-51 to 6-60. 



R. A. Dec!. 



H. M. ^ ' 



1 1.2 + 64 27 n CassiopeiiB . 



4 1.9 + 37 47 50 Persei 



6 39.6 + 43 61 i/( "Aurigm 



6 53.7 + 87 12 51 II Conhei 



7 41.9 - 33 69 Ijac 2957 



9 B6.2 + 32 25 20 Leo Min. . 



17 30.2 + 55 14 „ 'Draconis . 



19 20.2 + 11 44 31 Aquilm 



19 82.6 + 09 29 <r Draoonis 



21 21 + 38 17 61Cygni 



21 9.6 + 9 30 S Equulei 



21 65.7 - 67 12 e Indi .. 



12 Stars 



MAGNITUDE 5-,61 to G-60. 



R. A. 



ir. 



Decl. 



3.0 - .'12 18 Brad 1584.. 



S.5 + 45 40 S 1561 



7.2 ■+ 38 26 Grl830 .. 



9 43 LI 229.54 . . 



20 67 P XIV hr 212 



_ G.G -I- 39 61 Or 83,57 .. 



23 8.6 + 56 37 Brad 3077.. 



7 + 26 33 86 Pegasi.. 



11 29.( 

 11 33.t 



11 47.5 



12 10.( 

 14 



20 56.( 



8 Stars I 



nge 



Decl. 



MAGNITUDE 651 to 7-£0. 

 Mag. SpFct. 



11 86 



12 4.6 

 12 4.6 

 22 59.4 



53 7 LI 18115 . 7-5 



48 .58 6rl618orOA1060i .. 6-76 



49 21 Grl616 fi-51 



74 4 S 1616 7-0 



74 I Frd 1831 .. .. 7 2 



41 51 LI 22810 . . 7-6 



40 4 GrlSJo 7-4 



.36 .36 Lac 9362 .,71 



H Stars average 



MAGNITUDE, 7-61 ■ 



12.7 + 43 27 Gr. 31 



9 7.0 + 53 7 Fed 1457 



9 .37.1 



10 27.7 

 10 38.0 

 10 57.9 



+ 43 10 LI 19022 



+ 49 42 Gr 1037 



+ 47 7 LI 20674 



+ 36 38 LI 21185 



+ 44 2 LI 21258 



+ 48 14 Gr 1822 



+ 54 4 Fed 2511 or LI: 



+ 59 27 2 2298 



13 Stars average 68-7 



18 41.7 

 22 24.0 



+ 67 10 Krueger63 



MAGNITUDE 8-51 To 11. 



Mag. Spect. Light 

 Ye»rs. 

 12-0 

 •13-0 

 •10-93 

 *ll-30 

 ., 112-0 

 ' 12-0 



ll-f-7 



64-4 

 146-6 

 40-5 

 51-2 

 28-7 

 68-7 

 110 



52.000 

 69,000 

 60,001) 

 21,600 

 31,000 

 5,200 



Sun 

 Power. 

 OOlUO 

 0-0016 

 0-0050 

 0-00-25 

 00030 

 0-OOOb 



00034 



Sun 



Power. 



31,894 



3,!;61 



1,064 



268 



60 



1-410 

 013f 

 0-902 



oooai 



Answers to Correspondents. 



All Old Subscriber. — We propose very shortly to continue 

 the series of Star Maps, but we have been h.-iving consider- 

 able trouble in getting a reallv satisfactory means of repro- 

 ducing them. The De Forest system of Wireless Telegraphy 

 was described in " The Illustrated Scientific News " for 

 July, 1903. It differs from the Marconi in the sending ap- 

 ])aratus, in which no interrupters or coils are employed but 

 an ordinary alternating current, and in the receiving appara- 

 tus which is dependent on an electrolytic principle for its 

 action. 



Hmding.' -The [)rimitive b.uomcter described, namely a 

 long-necked flask inverted in a jar of water, is an instru- 

 ment with which we cannot claim any experience. 

 Theoretically, however, it should act on the same principle 

 as an- ordinary mercury barometer, that is, when the 

 pressure of the atmosphere increases, the water should be 

 pressed up the neck of the bottle. But with such an appara- 

 tus many other factors have to be considered, one of the 

 chief being the temperature, both of the outside air and the 

 ;iir and water contained in the bottie. The evaporation of 

 the water must also be taken into account. 



C.E.C. — The Harvest Moon is the name popularly given 

 to the full moon in September. .\t this period the moon 

 rises for several evenings running at about the same hour, 

 because its gradual northw.Trd movement compen.sates for 

 its ret.ard.'ition in rising. This is suppo.sed to favour the 

 g;ithering of the harvest. 



T.G. — .\mber containing insects is often to be bought 

 from naturalists or from tobacconists (who keep it as a 

 curiosity). But it seems that it is not regularly supplied 

 by either, being so seldom in demand. T.nnks for aquaria 

 are to be obtained from Mes^rs. W'atkins and Doncastcr. 

 36, Strand, W.C. 



