SCIENCE- GOSSIP. 



UNIVERSAL SCIENCE SERIES. 



READY SHORTLY. Vol. I. of 



BUTTERFLIES OF THE 



PALAEARCTIC REGION. 



By the Rev. H. C. LANG, M.D., F.E.S., &c. 



Comprising the Papilionidae, with Four Coloured and Thirty-four Photo Process Plates, handsomely printed on art 

 paper direct from specimens in the author's collection, together with map of the region and photographs of special 

 localities. 



Small 8vo., about 160 pages. Gilt edges, bound in limp leather for field use. Price 5s. net, or by subscrip- 

 tion direct to the office before publication, 4s. net. """" """ ~ """" " 



"SCIENCE-GOSSIP" OFFICE, no STRAND, LONDON. 



NOW READY. 

 THE CKAPJVIAIsr JONES 



PLATE TESTER 



SANGER 

 SHEPHERD 



& CO., 

 Sole Makers. 



A simple 

 instrument for 



testing 



photographic 



plates and films. 



Illustrated 



booklet sent on 



receipt of 



id. stamp. 



tV See " Science-Gossip," June No., page 22. 



SANGER SHEPHERD & CO, 



Factory and Offices : s, 6 & 7 GRAY'S INN PASSAGE, 

 RED LION STREET, HOLBORN, LONDON, W.C. 



W. LONGLEY, 



ENTOMOLOGICAL CABINET 



AND 



APPARATUS MAKER. 



1 



10 



11 



20 



21 



RED 



rcuw 



GRc-i 



ETE5 

 Slicfli 



RED l 

 REDS. 

 GREEN 

 BLUE 



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9 



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8 



13 



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23 



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7 



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Sanger 



'VjliCo 



NATURAL HISTORY AGENT AND BOOKSELLER. 



SOUTH BENFLEET, R.S.O., 



ESSE 2d. 



Nets, Breeding Cages, and Apparatus of every descrip- 

 tion ; Cabinets for Insects, Birds' Eggs, Minerals, Shells, 

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NOW READY. 



A NEW CATALOGUE 



OF APPARATUS AND MATERIALS 



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SANGER SHEPHERD PROCESS 



ALSO APPARATUS AND MATERIALS FOR 



ORTHOCHROMATIC PHOTOGRAPHY 

 and PHOTO-MICROGRAPHY. 



X5~ Post Free to readers of " Science-Gossip." 



CAMERAS FOR ALL PURPOSES. 



PHOTO-SPECTROSCOPES. CAMERAS and LIGHT 



FILTERS for PHOTO-MICROGRAPHY. 



Rotating Sectors, Instruments for the Measurement of Light 

 and Colour, Speed Determination, &*c. 



SANGER SHEPHERD & CO. 



Factory and Offices : 



5, 6 & 7 GRAY'S INN PASSAGE, RED LION STREET, 



HOLBORN, LONDON, W.C. 



Note. — Gray's Inn Passage is the second turning on the right in 

 Red Lion Street, coming from Holborn. 



Telegrams : " AUKS," LONDON. 



38 



ESTABLISHED 1760. 



Telephone : 1824 GERRARD. 



(HENRY STEVENS. D. PELL-SMITH.) 

 AUCTIONEER AND VALUER, 



KING STREET, COVENT GARDEN, LONDON, W.C. 



Every Friday at 12.30 Sales are held at the Rooms of Microscopes and all Accessories by best makers. Micro- 

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