218 Transactions British Mycological Soctety 
surface of the liquid by means of a sterile platinum wire loop, 
and withdrawn on to the side of the glass tube, where it was 
left exposed to the air inside the tube for 24 hours. It was then 
dippea under the surface of the wort, and again withdrawn 
and left for 24 hours, the tube being incubated at 25° C. in the 
sloping position. This treatment was continued for five days, 
the piece of bark being dipped and withdrawn every morning. 
At the end of this time signs of growth began to appear, 
and by the seventh day, sufficient mycelium had formed to 
enable sub-cultures to be made. 
The fungus then grew quite readily on ordinary Beer Wort 
Agar or Czapek’s medium, and was easily identified as Fumago 
vagans Pers. (= Cladosporium fumago Lk.). 
During the cultivation process, no other organism made its 
appearance. 
This seems to be of interest as a case of the persistance of 
life in the spores or mycelium of a Hyphomycete kept as a 
museum specimen for 67 years. 
R. LESEIE COLLET, 
(British Leather Manufacturers’ Research 
Association). 
ERROR IN BOUDIER’S MICROMETRIC MEASUREMENTS. 
Monsieur René Maire makes the following very important 
statement regarding Boudier’s measurements of spores in the 
Bulletin de la Société d’ Histoire Naturelle de |’ Afrique du Nord, 
vill, no. 9 (Dec. 1917), 247: ‘“‘Les mensurations de Boudier 
étant d’ordinaire trop fortes d’1/10 environ, par suite d’une 
erreur dans la confection de son échelle micrométrique.” 
CARLETON REA. 
Published the 13th December, 1921. 
