en 
scientific and semiscientific organizations of students,which 
in a way provide the best oportunity. There is a general nature- 
historical association of students and our botanical organiza- 
tion of the Mark Brandenburg with a weekly social evenrine #%, 
which united just about alllstudents, as long as they stay here 
( and some also of the past), who have a special interest In 
botany. Some doctors (medical) participate,those of the good 
old times,when medical doctors were concerned about botany. I 
can introduce your George, if he comes earlier, to the stu - 
dents of the scientific erant in short order and also with some 
professors of medicine. Our institutions have become better dN- 
rinz recent times. We have the finest chemical laboratory in 
the world,designed by Prof. Hofmann,to be ready late in the year. 
A magnificent, new anatomy has been In use for a year. 3 your 
Georze is serious about studying he will feel well here, and 
most impotant, he will be protected from all that seduces In the 
bie cities. He must not come to to see everything and enjoyit 
of what the bie city offers:in the besinning of his stay,How - 
ever he may get aquainted with the most remarkable toward the end 
of his presence here; at first I council blindness for your George, 
He will be taken into our and other familie's homes in a friend- 
ly way. and find his support. I council thus to rather send him 
here than to a small university.. 
Now I get to the Isoetes and I must explain further why 
all progresses so slowly. Your many new americans have throwr my 
classification for a loop, amd made much dubious again,what I had 
considered finite. Many old ones I had to examine anew, e.e. |. 
echinospora eoropala for stomata, which however I have not beem 
able to find so far. It is often not easy to gain certitude, and 
for this reason I bleached the leaves with wine-spirits to make 
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(efoJe)igtelai e-tI-1@1/-Te Gar Dan 
