220 REPORTS OF INVESTIGATIONS AND PROJECTS. 



to various systems. This indicates a common substance in hemoglobin or 

 a common structure in the various hemoglobin molecules. 



(5) The importance of twinning in the formation of crystal aggre- 

 gates and the constant recurrence of certain types of twinning in all of the 

 hemoglobins. These results will likely throw light upon the mechanism of 

 twinning and be of importance in general crystallography. 



(6) Differences between oxyhemoglobin and hemoglobin or reduced 

 hemoglobin, in certain species. Undoubted differences between the crystals 

 of these two substances in the crystals of the same species have been observed. 



Apart from the many important lines of investigation suggested by this 

 research, its bearing upon zoological classification alone makes it highly 

 desirable that the investigation be extended to include a large number of 

 species not yet examined. 



PSYCHOLOGY. 



Franz, Shepherd Ivory, Government Hospital for the Insane, Washington, 

 District of Columbia. Grant No. 80. For investigation of the functions 

 of the cerebrum, zvith special reference to the functions of the associa- 

 tion areas. (For previous reports see Year Book No. 4, p. 263, and 

 Year Book No. 5, p. 235.) $1,000. 



The work on the frontal lobes noted in the last report as completed has 

 been published as a monograph in the series "Archives of Psychology." 

 The general conclusions of this study were given in the last report (Year 

 Book No. 5, p. 235). An account of inquiries into the functions of the 

 temporal lobes is in preparation. 



Porter, James P., Clark College, Worcester, Massachusetts. Grant No. 

 445. Variation in the instincts of orh-zveaving spiders. $500. 



Dr. Porter reports the successful removal of spiders of the species Argiope 

 riparia and transversa from Worcester, Massachusetts, to Shawnee-on- 

 Delaware, Pennsylvania. This latter locality was chosen chiefly for the 

 reason that on the large estate of Mr. C. C. Worthington suitable places were 

 kindly offered where the spiders could find their natural habitat and at the 

 same time be carefully protected from disturbances of any sort. Both the 

 above expectations have been very satisfactorily fulfilled. Inasmuch as the 

 work is still in progress, Dr. Porter has had neither the time nor complete 

 data to make possible a quantitative expression of the results. The observa- 

 tions fall naturally into the following outline: 



I, Variation in webs: 



a. In the number of attachments to solid objects. 



b. In the number of radii. 



c. In the number of sticky concentrics above the free zone. 



d. In the number of sticky concentrics below the free zone. 



e. In the number of concentrics in the inner zone. 



