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-04. 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. 



Wards Natural Science Establishment 



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



"SCIEINTIA 



99 



INTERNATIONAL REVIEW OF SCIENTIFIC SYNTHESIS. Issued monthly {each 

 number consisting of 100 to 120 pages) . Editor : EUOENIO RIGN ANO. 



This is the only review which has a really international collaboration ; which is 

 of world-wide circulation and occupies itself with the synthesis and unification of 

 knowledge, in the history of the sciences, mathematics, astronomy, geology, physics, 

 chemistry, biology, psychology and sociology. 



This Review studies all the most important questions — demographic, ethnographic, 

 economic, financial, juridical, historical, political — raised, by the world war. 



It has published articles by Messrs. : Abbot =Arrhenius -Ashley - Bayliss-Beichman= 

 Bigourdan = Bohlln - Bohn = Bonnesen - Borel = Bouty = Bragg = Bruni = Burdick = Carver = 

 Caullery - Chamberlin - Charlier - Claparede - Clark - Costan tin - Crommelln = Crowter = 

 Darwin - Delage ■= De Vrles - Durkheim - Eddington = Edgeworth = Emery = Enriques - 

 Fabry - Flndlay - Fisher = Fowler = Qolgi = Gregory = Harper = Hartog = Heiberg - Minks = 

 Hopkins=Inigues-Innes=Janet=Kapteln=Kaye=Kidd-Langevin=Lebedew=Lloyd M organ = 

 Lodge - Loisy = Lorentz - Loria =Lowell - MacBride - Meiliet =Moret-Mulr=Peano =Plcard = 

 Poincare- Puiseux = Rabaud = Rey Pastor - Righi=Rignano-Russell=Rutherford=Sagnac = 

 Sarton- Schiaparelli = Scott = See - Sherrington = Soddy = Starling = Svedberg- Thomson = 

 Thorndike -Turner -Volterra -Webb -Weiss - Zeeman-Zeuthen and more than a hundred 

 others. 



"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 Xumber to the General Secretary of 

 ,, Scientia , \ Milan.) Annual subscription : 38 sh., or 9.50 dollars post free. 



Office : 43 Foro Bonaparte, Milan, Italy. 



Publishers: WILLIAMS & NORG ATE - London ; FELIX ALCAN- Paris? 

 NICOLA ZANICHELLI, Bologna. 



