A POPULAR ILLUSTRATED WEEKLY JOURNAL OF SCIENCE. 



[Registered at the G.P.O. as a Newspaper.] 



Vol. I. — No. 2. (New Series.) 



FRIDAY, JANUARY 13th, li 



[Weekly, Price 3(1. 

 By Post, Sid. 



FOR 



SCIENTIFIC APPARATUS 



OF EVERY DESCRIPTION, 

 Call or •write to 



J. T. MAYFIELD & CO., 



35a, &, 41, Queen Victoria Street, London. 



During JANUARY ONLY, 



1888. 



Special! dlscovui't of 



10 pex> cexi-t., 



by presenting this Coupon with order. 



Silver Medal Awarded at the International Ittventions 

 Exhibition. 



Price from 253. 



FACSIMILE PRINTING. 



In Permanent Black or any Colour, 



Print your own Notices, Circulars, Price Lists, etc., 



BY ZUCCATO'S PATENT 



TRYPOGRAPH. 



Simple, Cleanly, Reliable, Cheap. 

 Pays for Itself after ka Few Times Using. 



5.000 COPIES can be produced from One 

 Writing. Press not required. 



Full particulars, rvith Specimens of Work, 

 Testimonials, etc., on application to the Manu- 

 facturers and Patentees — 



ZUCCATO & WOLFF, 



15, Charterhouse Street, Holborn Viaduct, 

 London. EC- ^^ 



THE "STAR" 



IICROSCOPE 



Price £3 3s, 



The British Medical 

 yeuriial, — "A modern 

 marvel for its low price." 



The Morning Post.-~ 

 "Altogether the lowest 



R.&J.BECK 



68, CORNNILL, 

 LONDON, E.G. 



v 



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Cj LONDON, 0_^ 



Cv ^ 



^* 11, Great Garden Street, ♦ 



METAL FOUNDERS & MANUFACTURERS- 



Makers of Special Alloys. 

 All Antifriction Metals. 



B EVERY ONE SHOULD TRY 



These Patent Perryian Planished Printed Pens are simply 

 perfection for those persons who wnte rapidly It is almost 

 impossible to make them stick in the paper, spurt, or blot, 

 and they do not require dipping nearly as often as other 

 Pens. Prire Is.fer Box, or ^s. per Gross, 

 SOLD BY ALL STATIONERS. 



PERRY & Co., Steel Pen Makers. 

 HOLBORN VIADUCT, LONDON. 



KING8T0NSPECIALDRYPLATES 



Divided into 16 Priiaes 

 ranging from ^£20 to 

 213. -will be Riven for 

 the best Negatives ob- 

 tained on these well- 

 known Plates. 



£60 



PBICES OF PLATES. 



This Alloy is an Improved Brass, hard, durable, 

 and strong as M'ld Steel; of a beautiful gold 

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 of fine grain. It can be forged hot or cold, and 

 takes a very high polish. DELTA METAL is 

 being largely used for all kinds of machinery, 

 house, door and harness fittings, stair-plates, &c. 



K.S 1/- 2/3 A!Z 7/3 10/6 



60 TIMES 1/3 3/- 5/6 9/6 13/- 



Ertry Forms ean be obtained of all Dealers 

 or on receipt of stamped envelope from 



SAMUEL FRY & COMPANY, Limited, 



The Kingston Speoial Dry Plate and Bro- 

 mide Enlarging Works, 

 KINGSTON-ON-THAMES. 



For prices of Ingots, Plates, Sheets, RodSf 

 Wire, etc. J apply to 



ALEXANDER DICK, 



PATENTEE « MANUFACTURER, 

 no, CANNON STREET, LONDON. 

 Telegraphic Address — "Delta, London." 



PERKEN, SON,&RAYMENT, 



99, HATTON GABDEN, LONDON, 



Manufacture for 

 the Trade ONLY. 



"OPTIMUS" 



RAPID 



LENSES, 



Cameras, 



JAMES SWIFT & SON, 



Student's Microscope, 



Specially designed for Medical and Botani- 

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SWIFT & SON'S 



New Paraion Photographic Lenses, 



UNIVERSITY OPTICAL WORKS, 

 81, Tottenham Court Road, London, W. 



