reports of astronomical observatoriks. 0^7 



Instruments : 



(a) Meridian circles: 1. Transit circle by Tugugiiton & Si:\ims; one 

 movable aud oue fixed circle ; diameter .')(> inches divided to 5" ; 1(> 

 microscopes (carried by 2 Alidade circles, 1 movable and 1 tixed), read- 

 ing to l"-tentli by estimation; apertnre of object-glass <S,ij9 inches; 

 6J-iuch collimators; 2i-inch axle telescope. 2. Eeversing transit with 

 Vs for meridian and prime vertical, by T. Cooke & Sons; 4 inch 

 object-glass. 3. Transit instrnment by Trougiiton & Snnis; 2','-inch 

 object glass. 



(b) Meridian transit instruments: 1, Ah azimuth, by Trotghton & 

 SnoiS; 12 inch circles, divided to 5'; 4 microscopes, vertical and hori- 

 zontal circles reading seconds and tenths by estimation. Horizontal 

 circle movable. 2. Theodolite by T. Cooke & Sons. 3. Theodolite by 

 Aprs. 



(c) Equatorial instruments: One lo.OO-iiich refractor by Grubb. Sev- 

 eral sets of eye-pieces. Bitilar micrometer. ]\Ierz helioscope. Dawes 

 solar eye-piece, 2, 3, 74 inch tinders. This telescope is controlled abso- 

 lutely by the sidereal clock. Uriving-clock by T. Cooke & Sons, made 

 to special design. 2. One 12.9-inch reliector 122.5 focus; mirror by 

 Eev. H. Cooper Key English mounting. 3. One 12:^-inch reflector by 

 Browning. Solar spectroscope. 4. One G.OG-inch refractor by Soims ; 

 bifilar and double image micrometers, used generally for comet seeking. 

 5. One G.04inch refractor by T, Cooke & Sons. Comi)lete. 0. One 

 4-inch refractor by T. Cooke & Sons ; bitilar micrometer. Clock by 

 EiCHENS. Complete. 7. One 3-inch refractor by T. Cooke & Sons; 

 bifilar micrometer. Complete. 



{d) Sjjectroscopes : Large solar spectroscope with 1 whole and 2 half 

 RUTiiERFURD prisms with reversion aud heliometer viewing telescope. 

 Stellar spectroscope modified at Dun Echt (the one most used). Brown- 

 ing 5-prism automatic solar spectroscope and 2 stellar ones; also Vogel 

 spectroscope by Heustrell, and a variety of direct vision, quartz, aud 

 other prisms. Besides the above-mentioned spectroscope there is a 

 6-prism automatic reversing table instrument by Browning, aud a hand 

 direct vision spectroscope used for Auror;e. 



(e) Photometer: Zollner astro-photometer by Ausfeld of Gotha. 



(/•) Chronographs: 1. 4-fold barrel-chronograph, each barrel to run 

 6 liours, driven by the same clock as the 15.()<i-iuch equatorial. 2. Port- 

 able fillet chronograph by Siemens. 



{fj) Clocl-s : 1. Sidereal clock, quicksilver compensation by Frodsiiam. 

 2. Mean-time clock, quicksilver compensation by Molyneux. 3. Elec- 

 tric clock, outside dial and time gun. 



(/() Chronometers: 1. Kullberg; mean time. 2. FARgUHAR; mean 

 time 3 J Walker ; mean time. 4. Frodsuam ; mean tune 8-day. 

 5. Walker; sidereal (electric contact). 0. Walker; sidereal. 7. 

 McLennan ; -iV seconds ; pocket M. T. 



(0 Miscellaneous: 1. Metre: A copy of the metre des Conservatoiie. 



