Aug. 2, 1920.] Agricultural Gazette of N .S.W. 565 



from ^-he points of view of sanitation and purity of atmosphere. It fronts a tidal 

 river, and is bordered on the other three sides by green fields. The plate 

 developed from a 2^7 minutes exposure under the cream vat j)]atform, which is 

 open to and on the same level as the churn room, gave no evidence of moulds 

 or bacteria being present. The methods of making these exposures were 

 similar to those described in previous articles, and the results showed that 

 the premises and surroundings were remarkably free from infection— with one 

 exception. The plate D5 — three minutes air exposure in the cold room — 

 shows that this room was much infected with mould. Mould was also found 

 on the timber used for making butter-boxes, having evidently been brought 

 into the factory from the timber mill and box factory. The room where this 

 timber was stored in shooks, and where the butter-boxes were put together, 

 adjoined the butter-making room, and an exposure made in the current of 

 •air flowing between the door from this room to the outlet on the opposite side 

 of the churn room also showed the presence of mould organisms in numbers, 



A well-planned modern Butter and Cheese Factory on a Northern River. 



while the plates exposed on either side of this draught showed little or no 

 growth — thus demonstrating how the spores were being carried right through 

 the building and out the other side by the wind, after having been disturbed 

 in the box room, perhaps while the infected timber was being shifted or 

 while the different pieces were being nailed together. Possibly the force 

 of the wind off" the river was sufficient to lift the spores off the colonies growing 

 on the wood, without the latter being moved at all. The boxes, after being 

 filled with butter, were carried into the cold room and stacked almost to the 

 height of the ceiling. At the time of examination this room was almost 

 filled. In putting the boxes on the tiers, mould spores would be dislodged, and 

 they were in the air at the time the exposure was made, with the result shown 

 in D5, The manager of the factory was notified as soon as possible of what 

 was taking place, and advised to close or re-arrange the connection between 

 the timber storeroom and the manufacturing portions of the building, and to 

 have the cold room emptied as soon as could be arranged so as to thoroughly 



B 



