170 THE MICROSCOPE. 
ance, obviously a product of the chronic inflammation of the 
gland’s tissue. The most varied local changes result from prolonged 
local inflammation of the lymphatic glands. In regard to this, 
Weigert has already declared that very soon inflammatory adhesions 
with the bronchi at the hilus, arteries, veins, nerves and lymphatic 
vessels will occur, and at times also with the vena cava inf. and 
sup., and occasionally even with the vena azygos dextra. 
(TO BE CONTINUED.) 
OBSERVATIONS ON THE FERTILIZATION OF THE 
PHANEROGAMS. 
JOHN KRUTTSCHNITT, 
ib OTWITHSTANDING the unfavorable reception of my former 
remarks on the pollen-tube question by certain professors of 
botany in the United States and in Europe, I am induced again 
to place the result of my more recent investigations before the 
publie. 
The advocates of 
the process of fertiliza- 
tion of the vegetable 
ovules by means of 
pollen-tubes select fre- 
quently an Orchidaceze 
for its demonstration. 
The simple examination 
of a transverse section 
of an orchis, it seems 
to me, should be suffi- 
cient to demonstrate the 
impossibility of a tube, 
supposed to contain at 
its apex the generative 
a. Conducting tissue, (natural size). 
b. Ovary, transection, x 50. and vegetative nuclei 
c. 1, stigma ; 3,segment of the testis; 3. path of the : 8 : 
conducting tissue; 5. style ; 6, ovary, natural size. emitted by the pollen 
on the stigma of a number of plants, to penetrate into the ovary in 
search of the micropyle, and the oosphere in the embryosae. If this 
example be not sufficient, the study of the anatomy of Sarracenia 
flava should certainly carry conviction to any unbiased mind. 
Let us follow the path a pollen-tube would have to travel before 
it could reach the ovary. The pistil, in this instance, is a large, 
umbrella-shaped membrane, bearing the stigma in the angles formed 
