466 Scientific Intelligence. 



increased by the addition of an autographed portrait of Einstein, 

 of a biographical note, of appendix III on the experimental 

 confirmation of the general theory of relativity, of a short 

 bibliography of English works on the subject, and of an index. 

 Since the original text came from the pen of the highest authority 

 on the subject and since the translation has been done in a very 

 faithful and conscientious manner, the present volume can be 

 highly recommended to all who are interested in the epoch 

 making discoveries of A. Einstein. h. s. u. 



8. The Discovery of Electromagnetism Made in the Year 1820 

 by H. C. Oersted; by Absalon Larsen. Pp. 46. Copenhagen, 

 1920 (F. Hendricksen and H. H. Thiele).— On July the 21st 

 1820 the Danish physicist Hans Christian Oersted published 

 his first pamphlet on the effect of the electric current on the 

 magnetic needle. In commemoration of the great discovery 

 recorded in this pamphlet the present brochure was issued on the 

 centennial anniversary of the event by the Oersted committee 

 at the expense of the State. 



The preface, which is given first in French and then in 

 English, contains a brief account of the life and scientific career 

 of Oersted. This is followed by facsimile reproductions of the 

 Latin pamphlet published by Oersted and of the translations 

 of the original paper which appeared almost immediately in 

 French, Italian, German, English, and Danish scientific journals. 

 The Oersted medal, which is awarded as a prize for scientific 

 work, is reproduced both on the front cover and on the title page 

 of the brochure. The present collection will be welcomed by 

 all who are interested in the precise history of Oersted's epoch 

 making discovery. h. s. u. 



9. Augusto Righi. — The Italian publication "l'Arduo" has 

 recently dedicated a small volume of eighty pages to the memory 

 of the late Augusto Righi, Professor of Physics at the University 

 of Bologna. The first part of the text comprises six essays each 

 of which deals with special phases of the personality and of 

 the scientific career of Righi. This part of the book was written 

 by prominent Italians in their native language. The second 

 part of the volume consists of about thirty-five short letters of 

 appreciation and of condolence written by noted Dutch, English, 

 French, German, Italian, etc. physicists at the suggestion of the 

 editorial staff of TArduo. The value of the book is appreciably 

 increased by the frontispiece, which is an excellent reproduction 

 of an autographed photograph of Righi, and by another full 

 page photograph of the representatives present at the interna- 

 tional conference held at Paris in 1912, on which occasion Righi 

 acted as minister plenipotentiary for the Italian Government. 



h. s. u. 



10. Smithsonian Physical Tables. Seventh Revised Edition; 

 prepared by Frederick E. Fowle. (Publication 2539) Pp. xlvi, 



