November, 1910. 



KNOWLEDGE, 



Watsons Microscopes. 



British made at Barnet, Herts, witli 5 years' guarantee. 



The long evenings will soon be with us and a really attractive 



and intelligent hobby or means of recreation is wanted by manv. 



Have you ever tried a WATSONS' MICROSCOPE? 



Vou have scientific tastes and inclinations or you would not 

 read h'iiow/eiii;e. A Microscope is an ideal means of developing 

 such. The wealth of information it reveals, the new world it 

 discloses, the never ending subjects which can l)e examined, 

 together with the comfortable use of it at the fireside render it 

 unequalled for home use. 



Watsons make more than 20 different Models 



At varying prices. They are noted for their permanent working- 

 quality, and convenience of design. 



It is important that a Microscope Stand is selected to which 

 additions can he made as required. 



Watsons' "F " Edinburgh 

 Student's Microscope 



forms an admira.ble base for future 

 additions. It is a stand of the highest 

 class that always gives pleasure and 

 satisfaction. 



It is of convenient size, has very rigid 

 tripod foot, Watsons' Standard Lever 

 Fine Adjustment; Diagonal Rackwork 

 for Coarse Adjustment. Large stage, 

 covered Ebonite. 



PRICE. 



Stand only 



Mahogany Case 



STAND ''F" completely 

 fitted with Eyepiece, i" 

 and i/6" Parachromatic Ob- 

 jectives, in Mahogany Case 



£5 

 I 



8 7 6 



"F' Kd. Student's Microscope, 



WriH COMFOLND SlbsTACE. 



Compound Substage and Mechanical 

 Stage can be added at any time. 



Full particulars of Watsons* Microscopes are ^iven in their 168 page 



Catalogue of Microscopes (2K). which with their booklet. " The choice 



of a Microscope." will be sent free on request. 



ASTRONOMICAL TELESCOPES. 



All interested in A'^tronomy should send fijr Watsons' Catalogue 

 (6K) which gives information about their instruments and the 

 celebrated Watson-Conrady Objectives, post free on request. 



Watsons' Instruments may be purchased by progressive payments. 



SECOND-HAND 

 ASTRONOMICAL TELESCOPES. 



A list of Second-hand Telescopes is Issued monthly. A copy will be 

 sent on application. 



6 inch Equatorial by Giubli. with Clockwork 

 on Iron Column. Electric Illumination to 

 Verniers, Telescope for Vernier from Eve 

 End; original cost, £290. In fine condition 



4 inch Equatorial by Cooie &• Sons, on stout 

 Tripod Stand, with Struts, ij inch Finder, 

 4 Astronomical and Solar and Pancratic Eye- 

 pieces, Clamps and Slow Motions ; complete 

 with Packing Cases. Cost £77 10s. Od. Price 



24 inch Reflector Telescope by Grubb, Equa- 

 torial Stand, Electrically controlled Clock. 

 Fitted with 6 inch Finder Telescope. Cost 

 £650 Price 



SJ inch Reflector Telescope, with 2 Finders, 

 Equatorial Mounting and Iron Stand. The 

 Mirror has recently been re-worked and the 

 performance is guaranteed. A bargain 



£185 



£50 



£375 



£35 



For full particulars of the ahoz'e, also of nianv others^with sundry accessories 

 a7id fittings^ afpiy to 



W. WATSON & SONS, V 



(Established 1S37), 



313, HIGH HOLBORN, LONDON, W.C. 



Works: BARNET, HERTS. 

 Branch: 16, FORREST ROAD, EDINBURGH. 



npnnis- /2- Easy Row, BIRMINGHAM. 



uepois. ^jg^ Swanston Street, MELBOURNE, AUSTRALIA. 



DENT'S CLOCKS 



WATCHES AND CHRONOMETERS 



FOR SCIENTIFIC USH. 



Sidereal or Mean Time Clocks for 

 Observatories, £21 and upwards. 



THREE GRAND PRIZES 

 AND ONE GOLD MEDAL 



FRANCO-BRITISH EXHIBITION. 



The only Grand Prize awarded 

 to a British Firm for Watches, 

 Clocks and Chronometers. 



The only Grand Prize awarded 

 for Astronomical Regulators, 

 Chronog:raphs, and Ship's 

 Compasses. 



TRADE MARK. 



61, STRAND, and 4, ROYAL EXCHANGE, LONDON. 



Telephone No. 61 City. 



V( lU CAN OUT.VIN A 



SATISFACTORY TYPEWRITER 



For £5. 



All Makes — over 200 Machines to Select from. 



Call or Write . . . 



THE WHOLESALE TYPEWRITER Co., Ltd., 



22, GRAY'S INN ROAD, W.C. (Eleven Doors from HoIborn\ 

 COPYING AND DUPLICATING AT SPECIAL PRICES. 



BEST 

 COCOA 



SCHWEITZERS 



Kocootina 



EARTH. 



GUARANTEED ABSOLUTELY PURE SOLUBLE COCOA ONLY 



<!:^:S>-::^:------piET'7;'''-''H' -^^ 



,. ?S a fie i^RINTeO from iy%> ;:;,, 



LASCELLESM 



MAYBURY STUD/OS, /^M 



WILLISDEN CREEN, N.W. 



V; TE.LEPHONE No 45, HARLESDEN. 



iS\ 4? sff 





