LITERARY NOTICES. 



423 



Twin manuals on Heat and Light have 

 been prepared for the Cambridge Natural 

 Science Series (Macinillan & Co., New York, 

 $1 each), by R. T. Glazebrook, as elementary 

 text-books, theoretical and practical, for the 

 purpose of serving as aids in teaching by 

 experiments that may be performed by the 

 pupils themselves. Most of the experiments 

 described have been in use for some time as 

 a practical course for students in the Caven- 

 dish Laboratory. The rest of the two books 

 contain explanations of the theory of the 

 experiments and accounts of the deductions 

 from them, which have formed the substance 

 of the author's lectures to his class. 



The general purpose sought by Henry 

 Wood in preparing the Political Economy 

 of Natural Law (Lee & Shepard, Boston, 

 $1.25) was to outline a political economy 

 which is natural and practical rather than 

 artificial and theoretical. While independ- 

 ent of professional methods, it aims to be 

 usefully suggestive to the popular mind. 

 The present volume, though substantially a 

 new work, may be regarded as a develop- 

 ment from a small book entitled Natural 

 Law in the Business World, published in 

 1887. A portion of the original matter in 

 that book has been retained, somewhat 

 changed in form. No attempt is made to 

 make people content with things as they are, 

 but to turn the search for improvement in a 

 promising direction. We are glad to see 

 that the author sets himself squarely in op- 

 position to the fallacy that the interest of 

 labor is naturally antagonistic to other social 

 elements, which he thinks justly has done 

 much harm. 



After the Congress of Mathematics, held 

 in Chicago, in August, 1893, a colloquium on 

 Mathematics was held by Prof. Felix Klein, 

 of the University of Gottingen, with such 

 other members of the congress as chose to 

 participate, at the Northwestern University, 

 Evanston. During these colloquia Prof. Klein 

 delivered daily lectures, the substance of 

 which was taken down and prepared for 

 publication by Alexander Ziwet. These lec- 

 tures are now published as a single volume 

 of Lectures on Mathematics by Macinillan & 

 Co., New York ($1.50). Three of these lec- 

 tures relate to the work of the mathemati- 

 cians Clebsch and Sophus Lie ; the others are 

 on The Real Shape of Algebraic Curves and 



Surfaces, Theory of Functions and Geometry, 

 The Mathematical Character of Space Intui- 

 tion and the Relation of Pure Mathematics 

 to the Natural Sciences, The Transcendency 

 of the Numbers e and ir, Ideal Numbers, The 

 Solution of Higher Algebraic Equations, 

 Some Recent Advances in Hyperelliptic and 

 Abelian Functions, The Most Recent Re- 

 searches in Non-Euclidean Geometry, The 

 Study of Mathematics at Gottingen, and The 

 Development of Mathematics at the German 

 Universities. 



Mr. Charles H. Clark has prepared his 

 book on Practical Methods in Microscopy 

 (D. C. Heath & Co., Boston, $1.60) in view 

 of his observation that hi most of the excel- 

 lent current books on the microscope too 

 much is assumed to be known by the pupil, 

 or is left to be filled in by an instructor. 

 None of them, he says, gives to the private 

 worker in simple and concise language de- 

 tailed directions for the many processes that 

 he must learn in order to make practical use 

 of the microscope. The present book is the 

 outgrowth of the author's experience in the 

 use of the instrument in the branches of sci- 

 entific study pursued in the secondary schools. 

 So much of the mechanical construction of 

 the microscope is given as seems absolutely 

 essential to an intelligent understanding of 

 the instrument. The theory of polarized 

 light has been somewhat fully considered. 



The peculiar features of the Practical 

 Business Bookkeeping by Double Entry (D. 

 C. Heath & Co., Boston, $1.55), as set forth 

 by the author, Manson Seavy, are classifica- 

 tion of the subjects treated into parts, each 

 forming by itself an independent whole, with 

 subdivisions ; full and systematic treatment, 

 with illustrations of recounts; omission of 

 discussion of theory ; the acceptance of the 

 forms universally adopted by the best busi- 

 ness men and accountants in the treatment of 

 business transactions ; full discussion of bills 

 receivable and bills payable ; and the original, 

 simple, and intelligible rules given for clos- 

 ing a ledger, which have stood the test of 

 many years with classes of young students. 

 The work is supplemented by another, The 

 Manual of Business Transactions, which con- 

 tains transactions only, in the describing of 

 which the student must exercise his own 

 judgment, and thus acquire proficiency in 

 the application of principles. 



