470 BACTERIOLOGY. 
his forearm, rubbing it well into the skin. At the end 
of four days a large carbuncle, surrounded: by isolated 
furuncles, developed at the point where the culture had 
been applied. This ran the usual course, and it was 
several weeks in healing. No less than seventeen scars 
remained to testify to the success of the experiment. 
Bockhart rubbed upon the uninjured skin of the fore- 
arm a small quantity of an agar culture suspended in 
salt solution. By gently scratching with a disinfected 
finger-nail the epithelium was removed in places over 
the area to which the micrococcus had been applied. 
Numerous impetigo pustules, and occasionally a gen- 
uine furuncle, developed as the result of the procedure. 
Bockhart examined portions of the skin, which he ex- 
cised for the purpose, under the microscope, and came 
to the conclusion that the cocci penetrate by way of the 
hair-follicles, the sebaceous and sudoriparous glands, or, 
where the epidermis had been removed by scratching, 
directly to the deeper layers of the skin. 
Staphylococcus Pyogenes Albus. 
Isolated by Rosenbach (1884) from the pus of acute 
abscesses, in which it is sometimes the only micro- 
organism present, and sometimes associated with the 
staphylococcus aureus and other pyogenic cocci. 
It is morphologically identical with the staphylococcus 
pyogenes aureus, and is probably the same organism, 
which. has lost the property of producing pigment. . 
On the average it is somewhat less pathogenic. The 
surface cultures upon nutrient agar and potato have a 
milk-white color. Its biological characters are not to 
be distinguished from the staphylococcus aureus. 
