384 CARNEGIE INSTITUTION OF WASHINGTON. 



My activities will be briefly considered under the following headings: 

 (1) Work in Europe; (2) history of science; (3) Leonardo studies; (4) 

 history of physics in the nineteenth century; (5) the new humanism. 



1. Work in Europe.— From. July 17, 1919, until January 27, 1920, 

 I spent about one month in England, one in Italy, and three in Belgium. 

 In the latter country the hospitaUty of the Institut de Sociologie 

 Solvay greatly facilitated my work. The aims of my journey, as set 

 forth in my previous report, were accomplished. In particular, 

 meetings with Aldo Mieli in Florence and Charles Singer in Oxford 

 enabled us to discuss the organization of our common studies. The 

 recovery of the greater part of the notes, which I had been obliged to 

 abandon in Belgium in 1914, will enable me to take full advantage of 

 my work done before the war. This will be possible, however, only 

 when all these older materials, which the invaders left in a state of 

 utter disorder, are reclassified and amalgamated with my newer notes. 



2. History of Science. — Upon the unexpected recovery of my pre-war 

 collections, I resolved to resume at once the accomplishment of an old 

 design, namely, the writing of an introduction to the history and 

 philosophy of science, a sort of compendium of all the sources of in- 

 formation to which the student of the history of science may have to 

 refer. 



While in Belgium, I again took up the publication of I sis and edited 

 two numbers, 6 and 7 (Vol. II, pages 313-488; Vol. Ill, pages 1-156). 

 The chief feature of Isis is its critical bibliography of the history, 

 philosophy, and organization of science and of the history of civiliza- 

 tion. The last two numbers contain the reviews of 42 books and 

 papers, and about 1,150 other publications are briefly analyzed or 

 simply quoted. The first seven issues of Isis contain a total of about 

 144 reviews and 4,546 bibliographical notes. The aim of this bibli- 

 ography being primarily historical, the fundamental classification is 

 chronological (as much as possible by centuries). From Volume IV 

 onward, Dr. Charles Singer, of Exeter College, Oxford, will become 

 coeditor of Isis and will be specially responsible for the biological and 

 medical sciences and the mediaeval period, while I will assume 

 responsibility for the rest.^ 



In Volume II of Isis I have published a study of the development of 

 geology from 1775 until now, special stress being laid on the work of 

 Eduard Suess. This paper also contains a chronological list of the 

 main geological maps published since 1684.^ 



Upon my return to America, before proceeding to Cambridge, I 

 stayed four months in Washington, D. C, where my time was taken 

 up chiefly by (1) the study of the German publications on the history 

 of science which appeared during the war; (2) the preparation of No. 8 



iSarton, George: Avant^propos, Isis, Vol. II, 313-314, 1919; The publication of Isis, Science 

 vol. 49, 170-171, 1919. 



ifSarton, George: La synth&e g^ologique de 1775 h 1918, Isis, Vol. II, 357-394, 2 pi., 1919. 



