222 
CORRESPONDENCE. 
push over the surface of the wound atmospheric air. The adult 
septic vibrios, in way of scissiparity, would perish to the contact 
of the air, and their germs remain all sterile. More than that, 
one might throw over the surface of a wound, air overloaded 
with germs of septic vibrios, wash the wound with water holding 
in suspension milliards of these germs, without giving rise for so 
much the slightest septicaemia in the operated. But that in such 
conditions, a single clot of blood, a small fragment of dead meat 
be lodged in a corner of the wound, protected from the oxygen of 
the air, that they remain surrounded with carbonic acid gas, even 
to a very, small extent, and at once the septic germs will, in less 
than twenty-four hours, give birth to an infinity of vibrios, re¬ 
generating themselves by scission and likely to produce a septicae¬ 
mia fatal in a short time. 
(To be continued.) 
CORRESPONDENCE, 
A SKETCH OF THE DEVELOPMENT AND PRESENT STAND OF MI- 
CROSCOPIE IN GERMANY. 
By Dr. Edward Kaiser. 
From the Zeitschrift fur Mikroscopie , No 1, Oct. 1877. 
BY A LADY FRIEND OF THE REVIEW. 
The question as to when the microscope was first used in Ger¬ 
many as well as the time of its discovery is involved in impene¬ 
trable darkness. 
The names of the first mikrologes are also entirely unknown. 
Philippus Bonannus is mentioned as the first who worked with 
the microscope and gave his discoveries to the world. George 
Hufnagel, of Frankfort, in the year 1592, published a work on 
insects, with fifty copperplates. Herr Ilarting, however, declares 
in his valuable researches this assertion to be very doubtful. Ac¬ 
cording to his conclusions, the microscope was discovered several 
