Vol. 39 No. 10 
: BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
se 
a OCTOBER 1g12 
Protoplasmic streaming in Mucor 
F. M. ANDREWS 
INTRODUCTION 
During the years 1903 and 1904 Alfred Schriéter* carried out 
_4series of experiments in the botanical institute at Leipzig under 
Pfeffer’s direction on the subject entitled Uber Protoplasma- 
Strémung bei Mucorineen. The subject of Schréter’s study was 
were light; temperature; injury, as the severing of a hypha or a 
Sporangium; pressure, as upon a cover glass; influence of nutrient 
Media; osmotic substances, especially of different concentration; 
and transpiration. In making the above study Schréter also 
desired to test the accuracy and application of the work of Ternetzt 
the fungi he investigated. 
Some of Schréter’s experiments and pA a ae however, do 
Not seem to be altogether above criticism, and I have found some 
of his results and statements to be incorrect, as the following pages 
will show, 
_ Accordingly, during my recent study in Pfeffer’s laboratory I 
a reinvestigation of the various experiments of Schréter in 
to ascertain to what extent they were defective. I have 
"© extended the investigations of Schrdter in some places and 
ave given special attention to those experiments he performed 
Which do not seem to be entirely conclusive. 
+s 
; ter, Alfred. Flora gs: I-30. 05. 
emt. Charlotte. Jahrb. Wiss. Bot. 35: 273-309. 1900. 
BULLETIN for September 1912 (39: 415-454. pl. 33-35) was issued 9 S 1912.] 
455 
