1911] BRIEFER ARTICLES 229 
The stand offers a long rigid base for quite heavy cameras and is 
admirably adapted for use with long-focus cameras; it may be folded 
compactly with the tripod or be packed in a suitcase. It is equally 
useful in the office and laboratory, where objects may be placed on 
Some support, such as plate glass, to be photographed. 
Fic. 3 
The chief objection to any other device the writer has seen is that 
the tripod itself must be readjusted, always an awkward and tedious 
Process. With this stand only the camera has to be moved to and fro 
on the bed to get the proper adjustment after the tripod has been set. 
—Harry B. Suaw, Bureau of Plant Industry, Washington, D.C. 
HOMOTHALLIC CONJUGATION IN RHIZOPUS 
(WITH ONE FIGURE) 
A single case of homothallic conjugation in Rhizopus nigricans 
has recently been observed at the Hull Botanical Laboratory. The 
