90 SOCIETY OF NATURALISTS. 



make use of their Museum and Library during Iheir stay in this 

 city. 



" Alpheus Hyatt, Curator. 



" Edward Burgess, Secretary." 



"Mass. Inst, of Technology, Dec. 30, 18S5. 

 " Charles S. Minot, Secretary : — 



" Dear Sir, — I am requested by General F. A. Walker to ex- 

 tend to the American Society of Naturalists a cordial invitation 

 to visit the institute which is now in session, and to examine its 

 different departments. I desire also personally to invite the 

 members to visit the biological department, at any time during 

 their stay in Boston. 



" Yours very truly, 



" Wm. T. Sedgwick." 

 The following papers were read : — 



1. Prof. S. H. Gage. Dunnington's method of making colored 



diagrams, with modifications. 



2. Prof. B. G. Wilder. Exhibition of preparations illustrat- 



ing certain branch and class characters. 



3. Dr. Charles A. Oliver. Apparatus for the investigation 



of the color sense. 



4. Prof. J. H. CoMSTOCK. A new method of arranging en- 



tomological collections. 



5. Dr. Harrison Allen. Exhiljition of photographs in illus- 



tration of animal motion. 



6. Prof. M. E. Wadsworth. Laboratory instruction in min- 



eralogy. 



7. Mr. J. S. Kingsley. Some photographic processes of 



illustration. 



8. Prof. A. Hyatt. Muscology. 



9. Prof. W. O. Crosby. Arrangement of the mineralogical 



collection of the Boston Society of Natural Histor3\ 

 10. Prof. W. M. Davis. Geological sections, illustrating rate of 

 deposit and thickness of formations. 



