IMPORTANT NOTICE. 



From this date the First Series of this Magazine (1864-1889) can 

 be obtained only in complete Volumes, bound or unbound. 



A limited number of sets, from Vol. x to Vol. xxv inclusive, are 

 offered at the reduced price of £2 15s. per set net (in parts), or of five 

 consecutive Vols, at £1 per set net (if b^und. Is. per Vol. extra). 



Owing to inequality in stock, certain of the Vols, i to ix can be had 

 separately at lOs. each. 



The Editors will pay 2s. each for clean copies of Nos. 7, 9, 20, 

 and 21 of the First Series. 



Apply to the Publishers. 



May 2Qth, 1893. 



Scale of Charges for Advertisements. 



Whole Page £2. Half Page £1 Is. Quarter Page 12s. 6d. 



Lowest charge, 3s. 6d. up to 5 lines; 6d. per line afterwards. 

 Repeated or continuous Advertisements per contract. 

 There is no charge for Lists of Duplicates and Desiderata. 



Gom'plete in one thick volume, royal 8vo, with 59 plates engraved on copper 

 from the author's drawings : 



A MONOGEAPHIC EEVISIO>f AND SYNOPSIS OF THE 



-^ TRICHOPTERA OF THE EUROPEAN FAUNA. By Robeet McLachlan, 

 F.R.S., F.L.S., &c. Price, £3 10s. 



First Additional Supplement (with 7 plates), Price, 8s. 



London : Gurney & Jackson, 1, Paternoster Row, B.C. 



Berlin ; Friedlandee und Sohn, 11, Carlstrasse. 



yy 



"NATURE, 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. PRICE 6d. 



" Nature " contains Original Articles on all subjects coming within the domam of 

 Science, contributed by the most eminent scientific writers of the day. It also 

 contains Reviews of all recent scientific works ; Correspondence Columns, which 

 form a medium of scientific discussion and of intercommunication among men of 

 Science; Accounts of the leading Scientific Serials; Abstracts of the more 

 valuable papers which appear in foreign journals ; Reports of the Proceedings of 

 the Principal Scientific Societies and Academies of the World ; and Notes on all 

 matters of current scientific interest. 



SUBSCRIPTIONS TO "NATURE." 



£ s. d. fToaU placet AbroadJ. £ s. d 



Yearly 110 6 



Half- Yearly < 15 6 



Quarterly 8 



Nearly 18 



Half-yearly 14 6 



Quarterly 7 6 



ISIoney Orders to be made payable to MAC MILL AN and CO.. Ltd 

 Office: at. Martin's Street, London, W.C. 



4 11^^ 



-5-(c 



