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SCIENTIFIC BOOKS & SERIALS. 



WHELDON & WESLEY, Ltd. have the largest stock in the 

 country of Books in all departments of Science and Natural History, 

 also Transactions and Journals of Learned Societies, etc., in sets, runs, 

 and single volumes or numbers. 

 A LARGE SELECTION OF BOOKS ON ENTOMOLOGY. ANY WORK QUOTED FOR. 

 LIBRARIES OR SMALL PARCELS PURCHASED. 



SPECIAL CATALOGUES : Entomological, Botanical, Horticultural, Agricultural, 

 SZoological, Chemical, Geological, etc. - - - - 2d. each post free. 



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special attention given to foreign orders. .'. 'Vrice list free on application. 



IIVIPERIAL BUREAU OF ENTOMOLOGY. 



LIBRARY. 



Efforts to complete volumes of some of the serial publications 

 received in the Library of the Bureau have proved fruitless owing 

 to certain numbers being out of print. The Bureau will be greatl}' 

 indebted to readers who may be able to supply any of the following : — 



Ormerod (E. a.). Observations of Injurious Insects and Common Farm 

 Pests during the years : 



1877, 1878, 1880, 1883, 1885, 1883 and 1890. 



Philippine Agriculturist and Forester (Manila) : 

 Vols. I-IV (1911-16). Entire. 



Philippine Journal of Science (Manila) : 

 Vol. I (1906J. No. 10. 

 Section B (Tropical Medicine), Vol. VII (1912). No. 3. 



Porto Rico Department of Agriculture, &c. (San Juan) : 

 Journal, Vol. I (1917), Nos. 1 and 3. 



Proceedings of the Medical Association of the Isthmian Canal Zonk. 

 (Mount Hope, C.Z.) : 



Vol. HI (1910-11). No. 2. 



Le PROGR:fes Agricole et Viticole (Montpellier) : 

 1919. Nos. 19 and 51. 



