C/.C/i 



r 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

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





Newton's Episcope 



for the projection of 

 OPAQUE OBJECTS 



including 

 MAPS. DRAWINGS. 

 DIAGRAMS, PRINTED 

 and TYPED MATTER. 

 ILLUSTRATIONS. 

 NATURAL OBJECTS, 

 etc. 



Price list on application. 



Opticians to IICUfTOM O Pfl Estab. over 



H.M. the King. NEW I UN <X UU. 200 years. 

 Specialists iii t optical Projection Apparatus/or I 'isual Instruction, 



72 WIGMORE STREET, LONDON, W.l. 



BA1RD &.TATLOCK.C LONDON > LTD 



SCIENTIFIC INSTRUMENT MANUFACTURERS 

 and LABORATORY FURNISHERS. 



fl^SS^S^ 



Physical 



Apparatus 



for 



Schools 



and 

 Colleges. 



RESISTANCE BOX 



mima.i.H.-m:iJiii».i.,'Mi;j. u.ii/^^a 



REYNOLDS & BRANSON, Ltd. 



Chemical Glassware, Chemical and Physical Apparatus Makers 

 "merit (Home and Overseas Dominions), 



Laboratory Outfitter 



&c. 



tnd Pr 



and Gold Medal 



STROUD & RENDELL SCIENCE LANTERN. 



The "University" Lan- 

 tern, with Russian iron 

 body, sliding baseboard, two 

 superior objectives, with rack 

 and pinion for focussing, con- 

 densers 4 i in. diam., plane 

 silvered mirror "A," which is 

 moved by a knob causing the 

 rays to be reflected upwards 

 for the projection of objects 

 in a horizontal plane silvered 



vhich 



"C," 



nplete in travelling ca< 

 tor supporting apparatus. 

 PRICE ON APPLICATION. 

 CATALOGUES (Post free). 



and Accessory Apparatus. Chemical 



Che 





edii 



14 COMMERCIAL STREET, LEEDS. 



HIGH RANGE 



THERMOMETERS 



Of Guaranteed Accuracy. 



NATIONAL PHYSICAL LABORATORY 



certificate of N. & Z. Thermometer No. D 10520. 



212 F. 



300 



400 



500 



600 



700 



SOS 



Correction. 

 OF. 

 

 



+ 1 

 + 1 











Above is a copy of certificate of a Thermometer 



recently verified. 



%3RETTI © ZAMBRA 



38,H0LB0RN VIADUCT. E.C.I. 

 LONDON. 



