inst 



A WEEKLY ILLUSTRATED JOURNAL OF 



" To the solid ground 

 Of Nature trusts the mind which builds for aye." — Wordsw4rth. 



DEC 23 mi 



No. 225'o, Vol. 90] . THURSDAY, DECEMBER 12, 1912 X^^{gRip^,Styge'kdE 



the General Post Office.) 



lAtt-Rigfits Reserved. 



XMAS PRESENTS 



LASTING INTEREST. 



BAROMETERS, THERMOMETERS, FIELD 

 AND OPERA GLASSES, OPTICAL AND 

 MAGIC LANTERNS, MICROSCOPES, &c., 

 MEDICAL BATTERIES, VIBRO MASSAGE 

 INSTRUMENTS. 



NElAfTON <Sc CO., 



Oplicians la H.M. the King. 



72 WIGMORE STREET, W. 



(2 minutes from Bond Street Station, C.L.R.). 



THE "CHEMICAL" WEATHER GLASS, 



post free 4/-, is the most interesting instrument for fore- 

 telling changes in the weather. 



Also Special Consulting Room for Spectacles, 

 Pince-nez, &c. 



NEW 'LONDON' 

 MICROSCOPE. 



rVNDLE MODEL WITH 

 LARGE BASE. 



SHED IN BLACK ENAMEL. 



new moc'tl of the London Student's 



>cope has an extra large and heavy 



giving it great stability. 



It is nn the Handle 

 Model and the illus- 

 tration shows its con- 

 venient pattern. 



No. 1326 Stand ...3 13 

 ,, 364A Eyepiece 5 

 „ 802 \" Object 



Glass 12 



,, 804 y Object 



Glass 1 10 



,, 392A Double 



Nosepiece 9 



6 9 



No. 132S Stand with 



focussing subsiage,£4.7.6 



{as iUusiration^. 



R.&J.BECK,Ltd. 



68 CORNHILL. LONDON. E.G. 



REYNOLDS & BRANSON, Ltd. 



(AWARDED GRAND PRIX. TURIN. 1911.) 



SPECIAL APPARATUS 

 for Consterdine & Andrews' 

 ' PRACTICAL ARITHMETIC." 



Set " A," 120 models, 



£15 



Set " B," 75 models, 



£0 16 6 



(Dcscripti-e List ou 

 Applicatuvi. ) 



Special Apparatus for Mackenzie and Forster's 



Theoretical & Practical Mechanics & Physics. 



Detailed Catalogue on Application. 



CATALOGUES POST FREE. 



Scientific Apparatus and Chemicals. Apparatus for 



Teaching Mechanics, Machine and Building- Construction. 



Optical Lanterns. Photographic Apparatus. 



14 COMMERCIAL STREET, LEEDS. 



A Recording 

 Barometer of 

 the highest 

 quality and 

 best finish. 



Acceptable Presents. 



The problem of finding really acceptable Gifts at 

 Christmas time is solved by many of our instru- 

 ments, as — Barographs, Barometers, Binoculars, 

 Telescopes, Microscopes, Meteorological Appara- 

 tus, &c., and a lOO-page Illustrated List of 

 "Scientific Presents" 

 will be sent post free on request. 



NEGRETTI & ZAMBRA, 



Holborn Viaduct, London, E.G. ^, 



BRANCHES: °\ 



45 Cornhill, E.G. ; 122 Regent St., W. S| 



