Ward's Natural Science Establishment 



A Supply-House for Scientific Material. 



Founded 1862. Incorporated 1890. 



A few of our recent circulars in the various 

 departments : 



Geology: J-3. Genetic Collection of Rocks and Rock- 

 forming Minerals. J-188. Price List of Rocks. 



Mineralogy: J-109. Blowpipe Collections. J-74. Meteor- 

 ites. J-190. Collections; J-197. Fine Specimens. 



Paleontology: J-185. Complete Trilobites. J-115. Collec- 

 tions. J-140. Restorations of Extinct Arthropods. 



Entomology: J-33. Supplies. J-125. Life Histories. 

 J-198. Live Pupae. 



Zoology: J-116. Material for Dissection. J-26. Compara- 

 tive Osteology. J-94. Casts of Reptiles, etc. 



Microscope Slides: J-189. Slides of Parasites. Cat. 32 

 and 35. Rocks. 



Taxidermy: J-22. Bird Skins. J-31. Mammal Skins. 



Human Anatomy: J-16.- Skeletons and Models. 



General: J-193. List of Catalogues and Circulars. 



Ward's Natural Science Establishment 



84-102 College Ave., Rochester, N. Y., U. S. A, 



Publishers: Williams &Norgate. 14 Henrietta Street, Covent Garden, London, W. C, 



"SCIEINTIA" 



INTERNATIONAL REVIEW OF SCIENTIFIC SYNTHESIS. Issued monthly {each 



number consisting of 100 to 120 pages). Editor : EUQENIO RIGNANO. 



"SCIENTIA" continues to realise its program of synthesis. It publishes articles 

 which relate to the various branches o'f theoretic research, and are all of general in- 

 terest; it thus enables its readers to keep themselves informed of the general course 

 of the contemporary scientific movement. 



"SCIENTIA" appeals to the cooperation of the most eminent scientific men of all 

 countries. It has published articles by Messrs. Abbot {Washington)- Arrhenius 

 {Stockholm^- Ashley {Birmingham) -Bechterew {Petrograd) - Bohlin {Stockholm)- 

 Bonnesen (Kopenhagen) - Borel {Paris) - Bottazzi {Napoli) -Bragg {Leeds) -Bril- 

 louin (Pan's)-Bruni {Padova) -Castelnuoxo {Roma) -Caullery (Paris) -Chamberlin 

 ( Chicago )-Clatnician {Bologna) -Clark {New York) - Costantin {Paris) -Crommelin 

 {Greenwich) - Daly {Cambridge, U. 8. A.) - Darwin {Cambridge) - Delage {Paris) - 

 De Martonne {Paris) - De Vries {Amsterdam) - Durkheim {Paris) - Eddington 

 {Greenwich) - Edgeworth {Oxford) - Emery {Bologna) - Enriques (Bologna) - 

 Fabry {Marseille)- Fisher (Keiv-Havcn, U. 8. A.)-Foa {Tori)io)-Fo-wlerl{London)- 

 Fredericq {Liege)-Galeotti {Napoli) -Golgi (Pa via)- Gregory {Glasgoiv)- Gulgnebert 

 {Paris) - Janet {Paris) - Jespersen {Gentofte) - Kapteyn (Groningen) - Kidd 

 ( Ox/ord)-Langevin (Part's)-Lebedew (Moscou)-L.od%e (Birmingham)-Loisy (Paris)- 

 Lorentz( Haarlem) -Loria {Torino) -Lowell {Flagstaff, IT. 8. A.) -Maunder {Green- 

 wich) -JMeillet '(Paris) - Pareto {Lausanne) - Peano {Torino)- Picard {Paris) - 

 Poincare {Paris) - Puiseux {Paris) - Rabaud {Paris) - Righi {Bologna) - Rignano 

 {Milano)- Russell (Cambridge)- Rutherford {Manchester)- Say ce { Oxford) -Schiapa- 

 relli(Milano) - Seligman .{New York) - Sherrington {Liverpool) - Soddy (Glasgow)' 

 S vedberg ( Upsala) - Tannery (Paris) - Turner ( Oxford) - Vinogradoff (Mosco u) - Vol- 

 terra (Roma)- Von Zeipel (Upsala) - Westermarck (Helsingfors)- Willey (Montreal, 

 Canada) -Zeeman (Amsterdam) -Zenthen {Kopenhagen), and more than a hundred 

 others. 



"SCIENTIA" publishes, at present, in the section dedicated to sociological 

 articles, a series of studies on the" present questions of an international character 

 raised by the war. 



" SCIENTIA" publishes its articles in the language of its authors, and joins to the 

 principal text a supplement containing the French translations of all the articles 

 that are not in French. {Write for a specimen number.) Annual Subscription: 

 26 sh. 6, post free. office . V ia Aurelio Saffi, 1 1 - MILAN (Italy). 



