TEACHERS DEPARTMENT. 
I 3 I 
mals. (2) The disease may be transmitted experimentally. The 
botanical and cultural characteristics of the fungus are specific. 
In its pathogenic action it resembles the tubercle bacillus. (3) 
In man it develops on the skin but particularly in the respiratory 
apparatus, creating pulmonary mycosis resembling tuberculosis. 
It may co-exist with tuberculosis. (4) It is not a simple sapro¬ 
phyte but a true parasite. A. W. 
Notes on Regeneration. —The Begonia and the various mem¬ 
bers of the house-leek family have become almost classic material 
for the illustration of regeneration, but many other plants demon¬ 
strate the same principle quite as well. If the petiole of a Glox¬ 
inia leaf be imbedded in sand the base thickens into a tuber, while 
if a leaf of the wax plant ( Hoya ) be placed in sand in the same 
way, fibrous roots arise from it, showing that hereditary characters 
are regenerated in each case. 
The flower cluster of a Geranium may produce a shoot bud. In 
such a cutting made by me a bud had previously appeared in the 
midst of the flower cluster which was then plucked from the 
parent plant and placed in the soil. This bud grew into a leafy 
shoot and produced a new flower cluster, while the faded blossoms 
of the original inflorescence were still clinging to their stalk. 
This also produced a shoot-bud among its flowers. The original 
flower-stalk increased very little in size and after about six months 
was accidentally broken off. This was planted and is still growing 
vigorously. W. J. R. 
Are the; anthers of the Compositae fused together during 
growth or are they merely adherent through the agency of some 
adhesive material such as gum, resin or wax, is a question which 
has been raised and appears to have been answered satisfactorily 
by A. Tschirch.* He used freehand sections of material which 
had been hardened in alcohol. These were mounted on a slide 
in a strong solution of Sudan in a fluid made up of one part 
alcohol and one part of glycerin. After remaining twenty-four 
hours the stain was removed, without moving the cover glass, with 
alcohol and water, and pure glycerin was added for preservation. 
The cuticle is then bright red, the remaining tissues remaining 
* Flora, 93 : 51. 2 Nov., 1904. 
