686 



SCIENCE. 



LN.S. Vol. XXIV. No. 622. 



There still remain to be published chapters 

 on the nervous system and organs of sense, 

 organs of digestion, organs of circulation, 

 organs of respiration, organs of secretion, 

 and sexual organs. In the part already com- 

 pleted the chapters on morphology are marvels 

 of detail and thoroughness. The work itself 

 is a large octavo, and more than ninety pages 

 are devoted, for example, to the study of the 

 exoskeleton of the head, while nearly eighty 

 pages are occupied with the treatment of the 

 muscular system. Nearly all of the numerous 

 and strikingly apt illustrations are original, 

 having been drawn by Dr. Berlese himself. 

 Each section of the work is followed by a very 

 complete bibliography, and the author has 

 shown a perfect knowledge of the work of 

 other men, the publications of American au- 

 thors having been considered and studied with 

 a thoroughness quite unusual among Euro- 

 pean authors. 



The second volume, which has been reserved 

 for the treatment of biology of insects, will 

 contain a careful consideration of all ques- 

 tion* of economic importance, and it will 

 undoubtedly be of interest to learn from this 

 work Berlese's final views on the subject of 

 parasitism, and especially the relations of in- 

 sects and birds upon which point he has long 

 been at odds with other Italian zoologists. 



L. O. Howard. 



SCIENTIFIC JOURNALS AND ARTICLES. 



The October number (volume 7, number 4) 

 of the Transactions of the American Mathe- 

 matical Society contains the following papers: 



0. BoLZA : ' Weierstrass's theorem and Kneser'a 

 theorem on transversals for the most general case 

 of an extremum of a simple definite integral.' 



•T. PiERPONT : ' Area of curved surfaces.' 



W. A. Manning : ' On multiple transitive 

 groups.' 



L. Stickelbekger : ' Zur Theorie der vollstandig 

 reduciblen Gruppen, die zu einer Gruppe linearef 

 homogener Substitutionen gehoren.' 



L. E. Dickson : ' On commutative linear alge- 

 bras in which division is always uniquely pos- 

 sible.' 



H. F. Blichfeldt : ' On the order of linear 

 homogeneous groups.' 



J. I. Hutchinson: 'On automorphic groups 



whose coefficients are integers in a quadratic 

 field.'. 



F. E,. MouLTON : ' A class of periodic solutions 

 of the problem of three bodies with application 

 to the lunar theory.' 



J. H. McDonald: 'A problem in the reduction 

 of hyperelliptic integrals.' 



C. N. Haskins : ' On the differential invariants 

 of a plane.' 



This number contains also: Notes and 

 Errata, volumes 6, 7; Table of Contents, vol- 

 ume 7. 



The November number (volume 13, number 

 2) of the Bulletin of the American Mathemat- 

 ical Society contains: Report of the Thir- 

 teenth Summer Meeting of the American 

 Mathematical Society, by F. N. Cole; Report 

 of the New Haven Colloquium, by Virgil 

 Snyder; 'Theory and Construction of Tables 

 for the Rapid Determination of the Prime 

 Factors of a Number,' by Ernest Lebon 

 (translated by W. B. Fite) ; 'On a Funda- 

 mental Relation in Abstract Geometry,' by 

 A. R. Schweitzer; ' On the Orderly Listing of 

 Substitutions,' by D. Lehman ; ' The Boston 

 Colloquium' (Review of Lectures on Mathe- 

 matics by E. B. Van Vleck, H. S. White, F. 

 S. Woods) by J. I. Hutchinson; Correction; 

 Notes; New Publications. 



SOCIETIES AND ACADEMIES. 



national academy of sciences. 

 The autumn meeting of the academy was 

 held on Tuesday, Wednesday and Thursday, 

 November 20, 21 and 22, in the new buildings 

 of the Harvard Medical School, Boston. The 

 list of scientific papers was much longer than 

 it has been at any session of the academy in 

 recent years. It was, indeed, necessary to read 

 by title many of the papers, which according 

 to the program were as follows: 



Alexander Graham Bell : ' A few Notes Con- 

 cerning Progress in Experiments relating to Aero- 

 dromics.' 



William Edward Story, Clark University (in- 

 troduced by A. G. Webster) : 'A Method for the 

 Enumeration of Algebraic Invariants.' 



Arthur Gordon Webster, Clark University: 

 ' Acoustic Measurements.' 



W. T. Porter, Harvard . Medical School (intro- 



