Supplement to ''Nature" June 24, 1922 



THE 



COCCIDiE OF CEYLON 



By E. E. GREEN, F.E.S. 

 To be completed in Five Parts. 



PRICE, TO SUBSCRIBERS ONLY, £8 NET. 



Parts I. to IV. have already been issued. They contain pp. 1-334, 

 royal 8vo., with 115 Plates, chromo-lithographed in the finest style by 

 P. W. M. Tkap of Leiden, from drawings by the Author direct from 

 Nature. 



Part V., to complete the work, is in preparation, and will be issued 

 shortly. It will contain pp. 335-457. with Appendices ; also a complete 

 Index to the Five Parts, and 59 Plates. Price, £3 net. 



The Price will be raised to £ I O net on completion. 



Only a few copies remain for sale. 



DULAU & CO., Ltd., 34-36 Margaret Street, 

 Cavendish Square, LONDON, W.i. 



SCIENTIFIC PERIODICALS & BOOKS 



Messrs. W. Heffer & Sons, Ltd., Booksellers, 

 Cambridge, will be glad to receive offers of Com- 

 plete Libraries, Sets of Journals, and Smaller 

 Collections of Books, for which they are prepared 

 to offer full current value and pay cash. 



They have a very highly organised department for the 

 supply to Librarians, Institutions, and others, of Scientific 

 Books and Journals, both English and Foreign (new and 

 second'hand). They can guarantee promptitude and intelli- 

 gent handling of all orders entrusted to them. 



Catalogues arc frequently issued, and will be sent post free 

 on application. 



Licensed Valuers {or Probate. 



Telegrams and Cables : 

 Heffer, Cambridge. 



Telephone : 

 862 (2 lines). 



J. POOLE & CO. 



ESTABLISHED 1854 



SCIENTIFIC & EDUCATIONAL 



BOOKSELLERS 



Second-hand Books at about half published Price. 

 New Books for all Examinations. 



ENQUIRIES BY LETTER 

 RECEIVE IMMEDIATE ATTENTION 



104 Charing Cross Road, London, W.C.2 



THE HANDBOOK OF 



PATENT LAW OF ALL COUNTRIES 



By W. P. THOMPSON, F.C.S., M.I.Mech.E.. Etc., 



Chartered Patent Agent of Liverpool. 



Entirely revised and rewritten 1920. 157 pages. Crown Octavo. 



All Countries, 6s. British Law only, Is. 



"Should prove a very valuable and trustworthy guide to would-be 

 patentees." — Nature. 



London : Stevens and Sons, Limited. 



ORDNANCE SURVEY MAPS 



FOR EDUCATIONAL PURPOSES 



are supplied at CHEAP RATES. 



Full particulars relating to these Maps and all other 



ORDNANCE SURVEY MAPS and PUBLICATIONS 



can be supplied on application to — 



The director-general, ORDNANCE SURVEY OFFICE, SOUTHAMPTON. 



Scientific, Technical, Educational, 



Medical, on every other subject, 



and for all Exams. 



BOOKS ! 



SECOND-HAND AND NEW. 



1,000,000 vols, in itock. Catalogues free. State Wants. Books sent on approval. 

 BOOKS BODGHT : Best Prices Given. 



W. &G. FOYLE, Ltd., 121-125 Charing Cross Eoad, London, W.C.2. 



MESSRS. SOTHERAN 



have now opened a Scientific Department on the first floor of 

 their Strand House, where a selection ot their large stock in 

 modern, as well as old and rare, works on Exact and Applied 

 Science may be seen on the shelves. 



They would also call attention to their facilities in getting: sets 

 or runs of periodicals on scientific subjects, as well as rare or 

 out-of-print books they may not have in stock already. 



HENRY SOTHERAN & CO., 140 STRAND, W.C.2, & 43 Piccadilly, W.i, London. 



NOTICE 



If any difficulty is experienced in 

 obtaining NATURE from Book- 

 sellers or Newsagents, Orders, 

 with remittance, should be sent 

 to the Publishers. 



* ^* For Subscription Rates see p. cxcix of the current issue. 



Office of NATURE, St. Martin's St., W.C.2. 



We can supply at 

 short notice all 

 kinds of Small 

 Transformers to 

 Customers' own 

 special require- 

 ments. 



Specialities : 



Bell-Ringing and 



Adjustable 



Voltage 



Transformers. 



Enquiries invited. 



THE ZENITH MANUFACTURING CO., Zenith Works, Villiers Road, Willesden Green, London, N.W.2. 



Telephone: Willesden 1 1 15. Contractors to H.M. Admiralty, WarOttlce,PostOmce,L.C.C.&c. Telegrams: "Voltaohm,Willroad,London.'" 



