68 Dr. A. Ranaome. On certain Conditions that [Dec. 18, 



thin layer of cotton wool, one kind of cage being constructed of 

 two squares of glass, supported at their edges by cork, and surrounded 

 by cotton wool, tlio other of small flasks the bottom of which had 

 been cut off, and the lower edge resting in a small circular tray fitted 

 with wool, the months of the flasks being also loosely stuffed with the 

 wool. 



These watch glasses were then exposed for five weeks under the 

 conditions already noted, commencing on April 29, 1890, with the 

 exception of B. 9 and 10, which were started on May 2. Most of 

 the specimens were withdrawn on June 3; but one, B. 10, was 

 divided on May 13, and a portion, B. 10a, was introduced into a 

 glass bulb and exposed for several minutes each day to a current of 

 ozonised oxygen. 



All the specimens were then enclosed in a box and forwarded to 

 the Pathological Laboratory, Owens College, where Dr. Dreschfeld, 

 the Professor of Pathology, had kindly undertaken to carry out the 

 necessary inoculations. Owing to various causes, some of these 

 operations were not commenced until June 27, 1890, others until 

 July 10. The animals used were rabbits, kept under favourable 

 hygienic conditions. The dried sputum was mixed with sterilised 

 water, to form a pasty mass, and this was inserted into the sub- 

 cutaneous tissue of the back. All the instruments used were made 

 thoroughly aseptic. 



The following tables give : 



(1) The conditions of exposure. 



(2) The date of inoculation. 



(3) The date of death, by killing or otherwise. 



(4) Dr. Dreschf eld's report upon the results of the inocula- 



tion. 



