NA TURE 



[July 6. 1905 



SPECIAL ARRANGEMENTS for supplying C. H. F. MIILLER'S world- 

 renowned FOCUS TUBES at REDUCED PRICES have been made by 

 THE MEDICAL SUPPLY ASSOCIATION, 228 Grays Inn Road, 



_ ^ London, W.C. 



With Double Regulator for Raising & Lowering Vacuum, 24/- 



Tube similar in size but of different deMgn— without Regulator. 14/- 



vm- N^e-Hir Illust><a.ted and X>es 



Large Size (170 mm. diameter) Water Cooled ...£4 5 O 

 :i:>ij>^iire ll,is4: post fi:*ee* 



ox^os^iL-iEs^^r's o-jf^s £:3^o-i:i^£2^ 



RECENTLY 

 REMODELLED. 



Represents K and L 



types, giving' 3-5 H.P. 



and 5 H.P 



respectively. 



Immediate Delivery 



for Stock Sizes 



of Engines. 



GREAT REDUCTION 

 GAS CONSUMED. 



Up to the end of 1904, 

 over 51,000 g-as and 

 oil engines had been 



delivered, represent- 

 ing about three- 

 quarters of a million. 



actual horse-power. 



CR.OSSIL.E"^ SI2.0S., I-TD., OI'ElNrSH.A'W, aVCA-lVCHESTER,. 



T^:Ei^w XMCXOX^OSOOf»XO 



From the New Is 



ol \V. WATSON & SO^S• No. 3 CATALOQUE, just published. Post Free on applicatii 



Tsetse Flies (G. palpalis), whole insect 



Dissections of all parts may be had mounted separately. Also ii 



set of 12 



Send for Special Descriptive List. 



Blood-sucking Maggot (from the Congo) 



Fly hatched from above, ,-^ ;/tr/i;«t-ri7«y/(i; /rt/fo/iZ ... 



Section of Brazilian Quartz, showing cavities containing fluid 



Very interesting 

 Eggs of Emperor Moth, fertile and sterile, on i slide 



1 6 



2 6 



3/- & 4/- 

 t 6 



7 6 , Perfume Glands on Leaf of Lavender 



Bugula plumosa (Bird's Head coralline). Specially fine cnou 

 £10 0; Karyokinests in root of Water Lily 



Leg of Flea, showing muscular structure 



7 6 Set of 16 Slides illustrating the development of an Ascidian 



7 6 (Aspersa). Incase 25 



Trypanosoma Brucei (T.setse Fly disctse) 4 



3 6 Set of 5 Slides of the Garden Spider, showing different stages of 



1 6 growth. In Case 7 6 



SEND FOR THE ABOVE NEWLY PUBLISHED CATALOGUE OF MICRO. OBJECTS. 



WATSON'S CATALOGUE OF MICROSCOPES {15S pages) is of special interest to all Microscopists, 



post free. 



W. WATSON & SONS, 313 Higfh Hoiborn, London, W.C. 



Branches-16 FORREST ROAD, EDINBURGH and 2 EASY ROW, BIRMINGHAM. 



THE NEW NATURALISTS' CAMERA. 



^Sr 



Reflex Focussing for Ordinary or 



Telephoto. Lenses. 



ILLUSTRATED PROSPECTUS FREE. 



oo 



jr. H. DALLIVIEYER, Ltd., 25 Newman St., liONDON, W. 



MAKERS OF T.HE CELEBRATED DALLMEYER LENSES. 



i Street, London, W.C, and The Macm'ii 



