KNOWLEDGE. 



December, 1910. 



Electrical 



Measuring Instruments. 



LIBERAL 



jr'>ii*'"'""""'''™''iiiiia!i^>L 



DISCOUNTS 



TO 



EDUCATIONAL 



INSTITUTES. 



Illustrated 



List JB 



I FORMS A MOST INTERESTING AND LASTING XMAS Gin. | 



The "SIMPLEX " BAROGRAPH, 



(REGISTERBD No. 4f5S7!ll.) 



Post Free. 



BV Natlre s:iys : "'I'rii; i ,;t.i|. >^iu- in.il-.rs tli-.- -tlriil' i!i ^ .f a suitable inslrumenr of 

 any design a simple matter." 



ISENTHAL & CO. 



(Department 2), 



85, Mortimep Street, London, W. 



Contractors to the Admiralty, ll'aj; India, and Colonial Offices, &^c. 



In Oak Case, glazed top and sides. Records on a Weekly Chart. OQ 1 Q C 



Price, with a year's supply of Charts, Ink and Instructions, complete dwO I O 



r^~ Special Illustrated List of Barographs and Thermographs 



(covering: various patterns, from £3 lOs.). post free. 



SOLE MAKERS: 



PASTORELLI & RAPKIN, Ltd. 



(ESTABLISHED 1750.) 



ACTUAL MAKERS OF ALL KINDS OF METEOROLOGICAL INSTRUMENTS, 

 Contractors to fi.At. Government. 



46, Hatton Garden, London, E.G. 



STANDARD INSTRUMENTS OF ALL KINDS. 



[Illustrated Price List Post Free.) 



We pay carriage and guarantee safe deU\"ery within U.K. o 



all our Instruments. 



LANTERN SLIDES 



In all Branches of Natural Science. 



From 6,'- per Dozen. See Catalogue " E " post free. 



We have recently added to our Series of Slides 



"PLANT ASSOCIATIONS" 



From Xe"4;itives hy Mr. W. 1'.. Crvmi', JI.A. 



"ARCHITECTURAL DETAIL" 



By Mr. F. H. Crossi.ey. And many others. 

 l^T" For Particulars see our Supplementary List now in the Press. 



SLIDES MADE AND PAINTED TO ORDER. 



FLATTERS & 



32, DOVER STREET 



/ Close 

 V Univ( 



GARNETT, Ltd., 



;jr) MANCHESTER, S.E. 



Only Address. 



No connection with any other firm. 



SECONDHAND 



MICROSCOPES AND APPARATUS. 



Secondhand ** Discovery ** Microscope l>y Swift, double 

 nosepiece, 2 eyepieces, ^ and ^ olijectives. in case. £5 10s. 

 Sec('nd-hand yV Oil Immersion by Qowlland, £2 2s. 

 ., Aljbe Condenser and iiis diaphragm. £1 Is. 



,, Centring Achromatic Condenser and iris diaphragm 



in case by Zeiss, £2 10s. 

 ,, Air Pump with bell cover on mahogany base, t8s. 6d. 



rine case of 12 drawers to hold 6 dozen objecls, 2s. 6d. 

 A comprehensive selection of Microscopic Objects, including Geological, 

 Hutanical. Anatomical, Minerals, Diatoms. Insect parts, &c., at 6d. each. 

 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. 



Ca/a/o^ms post Jiee ou application. 



MILLIKIN & LAWLEY, ILS^ndIn^^T. 



Telephone— City 1706. 



DELICIOUS COFFEE. 



RED 



WHITE 

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For Breakfast & after Dinner. 



In making, use less quantity, it being much stronger 

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Typewriters 



MSS. Copied. 



Bought, Sold, Repaired, 

 and Exchanged. 



Hire . . lOs. a Month 

 or 27/6 a Quarter. 



Dept.\ 



TAYLOR'S, Ltd.,( 



74, CHANCERY LANE, LONDON, W.C 



Printed for the Proprietors (Knowledge Publishing Company, Limited), by John King, Ealing and Uxbridge.— December, 1910. 



