226 A. R. PENFOLD AND R. GRANT. 
(2) The crude oil is shown to havea high germicidal 
value when suspensions are made in 7% neutral soap 
solution. 
(3) The phenol and aldehydes are the active germicidal 
agents. 
(4) The residue remaining after removal of these is 
practically non-germicidal. 
(5) Neutral soap solution has no germicidal qualities when 
tested up to one hour. 
(6) This waste product is thus shown to have, when 
suitably prepared, a practical commercial value, especially 
when compared with both coal-tar and the present euca- 
lyptus oil disinfectants. | 
We desire to express our thanks to Mr. G. Hooper, 
Curator of the Technological Museum for kindly approving 
of our co-operation, and to Dr. E. W. Ferguson, Principal 
Microbiologist, Department of Public Health, Sydney, for 
kind permission to carry out the bacteriological work in 
the Microbiological Laboratory. 

