KNOWLEDGE. 



September, 1910. 



A NEW MOVING'COIL INSTRUMENT 

 For Alternating AND Continuous Currents. 



Ranges from 0-6000 Amperes. 



Illustrated Pamphlet on a/>/>licalion. 



ISENTHAL & CO. 



(Depaptment 2). 



85, MORTIMER STREET, LONDON, W. 



Contractors tf the Admiralty ^ War, India, and Colonial 0/ficcs, Sj'c. 



Dissecting Instruments. 



THE "OWENS COLLEGE" SET 



CONTAINING 



I large, I medium and I Elbow Scissors, 

 3 Scalpels, 3 Forceps, Razor, Strop, 3 Needles, 

 Metal Seeker, Blowpipe, Section Lifter, Triple 

 Magnifier, and Pipette with rubber cap, in 

 Teak Case, 21/- 

 Other Sets from ."5/6 upwards. 



See Catalo^ie ".5," Microscopes and 



Accessories, post jrc 



Flatters & Garnett, Ltd., 



32, DOVER ST., ^^^:^) MANCHESTER, S.E. 



Only Ad.Ii 



Xo connection wicli any oti 



DELICIOUS COFFEE. 



RED — 

 WHITE 



& 



BLUE 



For Breakfast & after Dinner. 



In making, use less Quantity, it being much stronger 

 than ordinary Coffee. 



THE "PEANDAR" (p. and r:) SET OF 

 STANDARD METEOROLOGICAL INSTRUMENTS 



Eminently suited for use in small Observatories, 

 Schools, and for Private Observers. 



Wet ftnd dry Bulb Thermometer. 



-u 40 io «o ft M « 1)0 w iaD^ta&ii' 



HiDimum Thepmomeler 



As illustraled. best quality. £6 6 O complele, including Register for one year. 

 Safely delivered free to any address in U. K,- Either instrument supplied separately. 



N.B. — All the above instruments will pass the Kew Observatory test. Kew 

 Certificates, if desired. £1 12 6 extra. 



vllW^: PASTORELLI & RAPKIN, LTD., ^?,T 



46, HATTON GARDEN, LONDON, E.G. 



ACTUAL MAKERS of all kinds of Meteorologrical Instruments. 



Vm- ILLUSTKATKD PRICE LISTS /'OS I FREK. 



SECONDHAND 



MICROSCOPES AND APPARATUS. 



Second hand Army Bacteriological Microscope, l>y 



J. Swift & Son, tUted with Abhe condensei and iris diapliragm, 



and 



oil 



triple nosepiece. eyt-piece, mechanical stage 

 immersion objectives. £14 14s. Od, 



Second hand Holoscopic Oil Immersion Condenser, by 

 Watson & Sons, N.A. i'-;o, witli iris diaphrai^m and set of 

 stops. £4 4s. Od. 



The Largest Stock in London of Secondhand Microscopes and 

 Objectives by all the leading makers, comprising Outfits suitable 

 for Histology, Bacteriology, Botany, and all branches of Science. 

 A comprehensive selection of Microscopic Objects, including Gt:ological, 

 Botanical, Anatomical, Minerals, Diatoms, Insect parts, &c., at 6d. eacti. 



Second-hand Pri:^nl Binocular Glasses, by Zeiss, Goerz^ Koss^ and 

 oLher makers in perfect condition. 



Catalogues post free on application. 



MILLIKIN & LAWLEY, .ISndInI'w.c: 



Telephone City 1706. 



Typewriters 



lASS. Copied. 



Bought, Sold, Repaired, 

 and Exchanged. 



Hire . . lOs. a Month 

 or 27/6 a Quarter. 



TAYLOR'S, Ltd., 



74, CHANCERY LANE, LONDON, W.C. 



Printed for the Proprietors (Knowledge Puljlishing Company, Limited), by Joll.N KING, Ealing and Uxbridge.— September, 1910 



