78 



SCIENCE. 



[N. S. Vol. XX. No. 498.. 



This gives in complete form the classification 

 of meteorites wrought out by Dr. Brezina at 

 the Vienna Museum and now brought quite 

 up to date. Seventy-four groups are named 

 and under each group are given the meteor- 

 ites assigned to each. The complete presen- 

 tation of this classification is a work which 

 will be of great service to students of meteor- 

 ites and an aid to further study of the groups. 

 ■Following this a table shows to what extent 

 these groups are represented in the Ward- 

 Coonley collection. It appears that all the 

 groups are represented and 95 per cent, of the 

 group localities. The total weight of the col- 

 lection is given as 2,495 kilos (5,509 pounds), 

 and the total number of specimens as about 

 1,600. The average weight of the representa- 

 tives of each fall is 4,138 grams (9^ pounds), 

 or, counting nothing over 50 kilograms to a 

 fall, 1,Y46 grams (3f pounds). 



The following meteorites are stated to have 

 larger representatives in the Ward-Coonley 

 collection than in any other : Among siderites, 

 Arispe, Bacubirito, Ballinoo, Canon Diablo, 

 Canyon City, Central Missouri, Costilla Peak, 

 Illinois Gulch, Luis Lopez, Nejed, Eoebourne, 

 Saint Genevieve, Surprise Springs, Tongan- 

 oxie, Ute Pass and Willamette. Among sid- 

 erolites, Morristown, Pavlodar and Veramin. 

 Among aerolites, Baratta, Bluff, Castine, 

 Indarch, MacKinney, Mighei, Ness County, 

 Oakley, Petersburg, Pipe Creek and Eushville. 



Adjuncts to the collection such as casts, 

 micro-sections, betyl coins, etc., are listed and 

 the ten illustrative full-page plates show the 

 appearance of about fifty typical specimens of 

 the collection and the manner of mounting 

 and installation. 



It is a cause for felicitation that so large 

 and complete a collection of meteorites is to 

 be found on this side of the Atlantic, and 

 students of science will join with Dr. Brezina 

 in congratulating, as he does in a recent letter 

 which the present writer has been permitted 

 to see, Professor Ward ' upon the results of 

 such uncommon energy and experience. In- 

 stead of three first-class world collections, 

 Vienna, London and Paris,' says Dr. Brezina, 

 ' there exist now four.' 



Oliver C. Farrinqton. 



Le Mouvement. By E. S. Woodworth. Paris,, 



O. Doin. 1903. Pp. viii + 421. 4 fr. 



This volume, which is a part of the 

 ' Bibliotheque Internationale de psychologie- 

 experimentale normale et pathologique,' edited 

 by Dr. Toulouse, is an excellent and complete- 

 discussion of movement in all its aspects. 



The work is divided into two parts, viz., I.^ 

 on the perception of bodily movements, and. 

 II., on the production of movement. 



In the first part there are excellent accounts, 

 of the physiological, clinical and anatomical 

 findings regarding the muscular sense, and of 

 the functions of the semi-circular canals in 

 relation to sensations of movement. The re- 

 mainder of the section is concerned with a 

 general survey of the literature on the percep- 

 tion of the extent, the time, and the force of 

 movement, on the perception of lifted weights,, 

 on weight illusions, and a critique of Weber's 

 law in relation to the perception of movement. 



The second part — on the production of move-- 

 ment — consists in discussions regarding reflex 

 action, coordination, dynamogenesis, motor 

 automatism, voluntary movement, rapidity of 

 voluntary movement — including reaction time- 

 — the precision of movement, and fatigue. 



Not every one will agree with the author 

 regarding the role of the synapses in the pro- 

 duction of habits, etc. (p. 227) : " S'il y a un- 

 arret quelconque dans le systeme nerveux,. 

 comme cela arrive pendant le sommeil, il 

 provient probablement du synapse. Et prob- 

 ablement aussi, c'est le developement des ex- 

 tremites nerveuses et le rapprochement des 

 extremites des branches de dendrites et de 

 I'axe qui produisent la formation des habitudes, 

 et la maturite des instincts." The movements 

 of dendrites and the shortening of spaces be- 

 tween parts of contiguous neurons has not 

 been sufficiently investigated to make the above- 

 statement ' probable.' 



Fatig-ue is considered to be a phenomenon 

 connected with muscle, very little or not at all 

 with the neurons controlling the muscle. This 

 view, it is admitted, is somewhat radical, but 

 the author guardedly concludes that ' the 

 theory of the participation of the central 

 nervous system in motor fatigue is without 

 proof (p. 400). It might also be retorted:. 



