December 13, 1895.] 



SCIENCE. 



819 



Systems of philosophy are criticised from the 

 point of view gained from this distinction. 

 Finally these two habits of thought are con- 

 nected respectively with the two principles of 

 organic and mental development called Habit 

 and Accommodation in the author's recent work 

 on ' Mental Development. ' 



Some Observations of the Anomalies of Self- Con- 

 sciousness (11) .• JosiAH RoYCE. The conclusion 

 of the paper with the same title in the September 

 number. A case is given from the author's ac- 

 quaintanceship illustrating the general principles 

 laid down in the earlier paper. 



The Perception of two Points not the Space- 

 Threshold : Guy Tawney. A re-examination 

 of the sensibility of the skin to differences of 

 position when two points are touched at slight 

 distances apart. A variety of semi-spacial dis- 

 tinctions are discovered when the two compass 

 points are nearer than can be clearly distin- 

 guished ; and the writer takes these vague 

 judgments of size, direction, etc., to indicate 

 that the distance just felt as two stimulations is 

 not really the ' threshold ' for space perception, 

 as is generally supposed ; but that there are 

 indications of a confused ' extensity ' sensation 

 in connection with all touch stimulations. 



Discussion. Physical Pain : H. R. Marshall. 

 A reply to the article by Prof. Strong in the 

 July number. A Case of Subjective Pain : J. H. 

 Claiboene. This note relates a case of ' a 

 wave of pain ' felt ' after an operation on the 

 eye ' simply when the absence of a friend was 

 thought of, the pain being succeeded by pleasure 

 when the friend was thought to be present 

 again. Psychological Literature, Notes, &c. 



BOTANICAL GAZETTE, SEPTEMBER.* 



The body of this issue is devoted to reporting 

 the proceedings of the Botanical Society of 

 America, the Botanical Section (G) of the 

 American Association for the Advancement of 

 Science and the Botanical Club of the A. A. A. 

 S. The address of Dr. J. C. Arthur, as vice- 

 president of section G, is printed in full ; sub- 

 ject. Vegetable Physioloyy. 



In the department of Noteworthy Anatomical 

 and Physiological Researches Borge's ' Ueber die 

 Khizoidenbildung bei einigen fadenformigen 



* Issued September 25, 1895. 48 pp., 1 pi. 



Chlorophyceen ' is abstracted by Miss Stone- 

 man, and Meyer's ' Untersuchungen iiber Bak- 

 terien ' by Dr. Russell. 



In Briefer Articles Frank M. Andrews de- 

 scribes the development of the embryo sac of 

 Jeffersonia diphylla, and Lyster H. Dewey de- 

 scribes a new species of Laphamia (L. ciliata) 

 from Arizona. The Editorial pages are devoted 

 to a discussion of the nomenclature question 

 apropos of the action of the Botanical Club. In 

 Open Letters Mr. F. V. Coville replies to Dr. 

 Robinson's objections in the August number to 

 the reformed nomenclature, and Mr. C. F. 

 Millspaugh writes against decapitalization of 

 specific names. Three pages of Notes and Neivs 

 close the number. 



BOTANICAL GAZETTE, OCTOBER.* 



New or Peculiar Aquatic Fungi, L.: Roland 

 Thaxter. This is the first of a series of four 

 papers, and deals with the genus Monoblepharis, 

 of which the writer recognizes four species in 

 this country, 31. jiolymorpha Cornu, ' a second 

 form related both to this species and M. sphse- 

 rica,' and two new species, M. insignis and M. 

 fasciculata. The life history of the new forms is 

 given, together with a description of the two last 

 named, illustrated by a lithographic plate. 



The Regulatory Formation of Mechanical Tissue : 

 F. C. Newcombe. Prof. Newcombe shows in 

 this paper how the mechanical theory of growth, 

 as determined by hydrostatic pressure within 

 the cell and by the resistance of the cortex, 

 gradually grew up ; points out the fact that 

 these, its two most vital supports, have been 

 shown to be mere assumptions ; and shows that 

 gro^vth, and especially the formation of me- 

 chanical tissues, is self regulated and is a phe- 

 nomenon of irritability, a genuine reaction to 

 strains. 



Synopsis of North American Amaranthacex, IV. : 

 Edwin B. Uline and Wm. L. Bray. The 

 genus Alternanthera is treated in this installment. 

 Eight species are recognized. A. Kerheri, from 

 Mexico, is described as new. 



In the department of Noteworthy Anatomical 

 and Physiological Researches Mr. G. H. Hicks 

 gives a resume of Massart's ' La biologie de la 

 vegetation sur le littoral Beige;' Prof. Mac- 



* Issued October 17, 1895. 40 pp., 1 pi. 



