OPENING OF THE JOHNSTON LABORATORIES 
5 
The preparation of the various sera and vaccines will be carried on at the 
farm station, and opportunities will be afforded to those interested in the subject to 
acquire the principles of their manufacture, and also to avail themselves of the 
practice in veterinary science at the out-patient department shortly to be established. 
Machine Room 
A large room has been fitted in the Thompson Yates laboratories with 
apparatus for the use of the various research departments. Shafting running the 
length of the room is driven by a 10 horse-power motor, and from the shaft is 
driven an hydraulic press giving a total pressure of 200 tons, a high-pressure filtering 
apparatus, and gas liquefier, and a powerful centrifuge. From a smaller motor and 
shafting is driven a large centrifuge, a vaccine mill, a bacterial mill and disintegrating 
apparatus. The shafting is so constructed that new apparatus can be added as 
occasion requires. 
Manufacture of Media 
A special room has been set apart for the preparation of media, which is now 
required in large quantities. A method which has proved very useful is the use of 
various coloured cotton plugs to distinguish the numerous sugar and other media. 
