important ones. These include the aspen association, the 

 hardwood forest, the tamarack and sphagnum bog, the 

 arbor-vitae bog, and the sand dunes, lagoons, and beaches 

 along the lake shore. 



Tuesday and Thursday. Four hours credit. Assistant 

 Professor Gi^eason and Dr. Gates. 



Prerequisite: Course 2 at the Station, or Course 26 

 or 22 at the University, or graduate standing. 



This Course gives full credit to graduate students. 



4. Special and Research Work in Botany. — Students 

 who have taken Courses 2 or 3, or have had adequate 

 botanical experience elsewhere, will find at the Biological 

 Station excellent opportunities for further study or re- 

 search in many lines of botany. Undergraduates, or 

 graduates beginning research and consequently needing' 

 personal direction, are advised to choose a problem along 

 ecological or systematic lines. Advanced students or in- 

 dependent investigators are free to choose problems in 

 any line of botany, and every effort is made to provide 

 them with the necessary facilities and equipment for their 

 work. 



Days to be arranged. Two, four, six, or eight hours 

 credit. Assistant Professor Geeason and Dr. Gates. 



Prerequisite : Admission only by arrangement with 

 the instructors in charge. 



This course gives full credit to graduate students. 



5. Plant Anatomy. — The general facts and principles 

 of plant anatomy are presented by material collected and 

 prepared by each student individually. Students thus 

 have practice in the preservation of material, methods of 

 fixation, section cutting, and staining. Every facility will 

 be given for the collection of material for use in teaching 

 or in research. The topics chiefly considered are the 

 anatomy and secondary thickening of the stem, the struc- 

 ture of the foliage leaf, and its modifications in different 

 environments. 



Monday. Two hours credit. Assistant Professor 

 Geeason and Mr. Rogers. 



Prerequisite : Elementary collegiate botany. 



