Notices respecting New Boohs. 491 



and though the weather effectually prevented any results being 

 secured on that occasion, Prof. JSaegainvala obtained the valuable 

 opportunity of examining the numerous instruments brought 

 together by five different parties of European astronomers. This, 

 of course, was of the greatest ser\ice to him in forming his plan of 

 observation and selecting his instruments for the Indian eclipse, 

 but unfortunately some improvements which were considered 

 desirable in his equipment were completed only just in time, 

 which is to be regretted because longer preparation in the matter 

 of adjustments would have secured greater precision when the 

 eventful moment arrived. Ne\ertheless, results of great value were 

 obtained, the details of which are given in this volume, together 

 with the illustrations requisite to enable readers to follow a scheme 

 carried out with great skill. All the parties in India were 

 favoured with most propitious weather, aud the eclipse was well 

 seen and observed, as was cabled to England immediately. (The 

 present writer had the satisfaction of announcing this at a 

 lecture delivered at South Norwood on the evening of the same 

 day.) Jeur (the site selected) is near the very centre of the line of 

 totality, and is a station on the Great Indian Peninsula Railway, 

 nearly east of Poona. A locality at the Southern Maratha line 

 would have been superior in se\eral respects; but owing to the 

 fact that the plague was raging in that neighbourhood, Jeur was 

 preferred, and near it an observing camp was prepared, about 

 one hundred yards to the west of the spot selected by Prof. W. 

 "W. Campbell, of the Lick Observatory. Great care was used in 

 training the assistants who went to take part in the work, and the 

 final result w 7 as highly satisfactory. To use the words of the Beport 

 of the Council of the Royal Astronomical Society in February 1899, 

 "Prof. Naegarmala of the Poona College, assisted by a number 

 of his students, secured an excellent series of photographs both of 

 the corona and also of the chromosphere spectrum with the pris- 

 matic camera." To appreciate these, the reader must refer to the 

 volume itself. W. T. L. 



Die Intern ationalen Absoluten Masze, Insbesondere die EJectrischen 

 Masze, fur Studirende der Electrotechnik. Von Dr. A. vo:s r 

 Waltek hopen. Dntte, zngleich als Einleitung in die Electro- 

 technik bearbeitete Aurlage. Mit 42 eingedruckten Eiguren. 

 Biaunschweig : E. Vievveg und Sohn. 19(j2. Pp. xi + yOO. 



This book on units covers a very wide field. It is divided into 

 two parts, Part I. dealing with the subject of units, and Part II. 

 consisting of a series of appendices, devoted mainly to the eluci- 

 dation of various points connected with magnetic and electric 

 theory. This second part is also intended by the author to form 

 an introduction to electrotechnology. In our opinion, the treat- 

 ment of the subjects considered in Part II. is much too condensed 

 and scrappy to be suitable for a student, although to one already 

 acquainted with the subject it may prove a useful compendium. 



