VOLUME XXXIII. NUMBER 

 New Series. Volume VII. Part 9. 



3UD. 



Articles : 



SEPTEMBER, 1910. 



Fot NiiKii pv Richard A. Proctor. liSl. 



-Plainly Worded. Subjects :— Exactly Described. 



ONE SHILLING NET. 

 Entered ai Stationers' Hall. 



SECOND-HAND 

 TELESCqPESJ^R SALE. 



For full particulars see Second-hand Catalogue. 



REFRACTORS. 



lo-in. COOKE EquatoTial .. 

 7.in. GkUBB do. 



i-in do. 



5.in. D.\LLMEYER Altazimuth 



4^in. WR.AY Jo- 



reflectors. 



i2-in. BOOTH Altazimutn . . 

 6l-in EROWNINO Semi-Equa-.oriaL 

 4j-in. BROWNING Equatorial 



2(KI 



£120 

 15 



BAKER, 244, High Holborn, London. 



Aneroid Barometer, 



5-inch Dial, with Thermometer, in Carved Circular 

 Oak Frame, £1 5 O. 



MAKERS Of NEW lELESCOPES, OBJECl 

 GLA>-E< KVK.1.EN.SES, PRISMS, and other 

 ASJ-RONOMICAL APPARATUS. Etc. , 



BROADHURST, GURKSON & Co. 



63, Farringdon Road, London, E.G. 



J ;o rca >J ■!.' J.y. BtirlU-t: s btmainss.) 



ne«iERS in SECOND-HAND TELES- 

 roPFS \nCROSCOPES. L.\NTERNS. .-.na 

 ircllsORIEr Also PRISM and ORDINARY 

 FIELD GLASSES. Etc., Etc. A Large and varied 

 Stock bv the P.e.st Makers always on offer. 



No other Beverage 



eives so much Strength and Vitality 

 to the System as Cocoa when maiiu- 

 factured "with the care and on the 

 principles embodied in 



PURE CONCENTRATED 



*Goeoa 



" HAS WON MORE AWARDS THAN ANY OTHERS ." 

 HEALTH IN EVERY CUP. 



ANEROID BAROMETER, in Metal Case, £1 10 0. 



These Insluimeiils are English throughout, materials, 



workmanship, and carving. 



Barometers of every description, from 21/- "ch. 



PEDOMETERS, for mea.suring the distance walKea 



(London-made), from 17 6 each. 



Illiistrijtcd Cataloiiite id. 



NEWTON & Co., Opticians to H.M. the King, 

 3 FLEET STKEET, LONDON. 



Awarded Grand Prix Franco-British Exhbn., 1908; 



Nine Medals at the Pans Exhibition, 1900; 



London, 1862; Paris, 1867; London, 1885; 



Philadelphia, 1876. 



JAS. J. HICKS, 



8, 9 & lo, Hatton Garden, London, 



Scientific Instrument Maker 



To H.M. Home. Indian, and Colonial Govern- 



ments. manv Foreign Governments, and the 



Principal Observatories, Ln.versities and 



Colleges throughout the World. 



MANUFACTURER 



OF 



STANDARD METEOROLOQICAL 

 AND SCIENTIFIC INSTRUMENTS 



OK EVERY DeSCRII-TION. 

 CJ(a/oc«M. Estimates. & all Information fr€€ trs Keturn 

 *■ •• Po.sf. 



ANY KIND OF SCIENTIFIC INSTRUMENT 

 MADE TO ORDER. 



Exceptlmat Tertns to OdUg^ Institutions, etc. 

 Quotations submitted for Laboratory Outfits or 



Single Instruments. 

 Thermometers for Student Work a Speciality. 



Makers to H.M. The King. H.M. 



The Queen, and H.R.H. Tne 



Prince of Wales. 



And to the People for nearly 200 years. 



pmrrocBftPHicmmocuE'-' APPLICATION |£ 10-10.0 



JAMES WOOLLEY, SONS&C°E" 



^i^R^S^L* 7WAN CHESTER 



^AMFRAS OF LVERY DESCRIPTION FR0M5/-| 



The New Short Mount 



OF THE 



Adon Telephoto Lens 



(BRITISH MADE), 

 Makes this little instrument still neater, and easier 

 to use It noNV n-.easures only 2i inches in length, 

 wei-hs 5 ozs., is fitted with rack and pinion and 

 Iris°diaphragm, and t;ives sharp definit.on over 

 iVlates from Si bv 2i to 15 by 12. At the same 

 Sln^l™" fh^e ordinary lens the ADON gt>^s a 

 picture nearly three times as large, and that at an 

 aperture suitable for Snapshots. U uh longer exten- 

 sion it gives 4, S, 10 and higher magnifications. 

 Mounted in .-\luminium. 



Price - £3 . 10 . O 



SOLID LEATHER C.\SE INCLIDED. 

 Illustrated Booklet free from 



J. H. DALLMEYER, Ltd., 



{Es!ai-:iiiti't jSooi. 



4, DENZIL WORKS, NEASDEN, LONDON, N.W.. 

 and 25, NEWMAN ST.. OXFORD ST., W. 



LEITZ PRISM FIELD GLASSES. 



Supplied with or -nithout central focussing scre«. Price list tree on rcqu 



E. LEITZ, Oxford House, 9, Oxford St., London, W 



or from any flrst-class Optician. 



Bookstall 



Knowledge" may be obtained through any 



Offices:— 42, Bloomsbury Square, London, 



or Newsagent. 



w.c. 



