FAP E a ee aN 
Sxey.—On supposed Paraffin Deposit at Waiapu. 397 
whenever the temperature of the air was such as to render ventilation 
useless it was probable freezing mixtures would be the best to try this time, 
especially as from experiments I had made I could not recommend cooling 
by evaporation. This I believe was done. Mr. J. Anderson made some 
experiments in his boiler-room, and found a small quantity of freezing 
mixture sufficient to keep an experimental chamber 15 degrees below the 
temperature of the air of the room. I cannot say I am sanguine of the 
success of the experiment. The varying ripeness of the cheese and the 
difference of quality found in butter, even in Christchurch, would I fear 
prevent a great success, even were the confessionally perfunctory arrange- 
ments for cooling found to be sufficient. I believe, with Mr. Bowron, that 
the factory system, or some other means of guaranteeing uuiformity, is an 
indispensable feature of any successful scheme of making Europe the market 
for the butter and cheese of Canterbury. 
I may add that I personally know nothing of the time or the temperature 
at which butter and cheese will keep sweet; but if they will keep good at 
68° Fahr., I do not believe it would be a difficult matter to keep the air in 
& good nonconducting chamber from rising above that temperature during 
an ordinary voyage. 
Arr. LXIV.—On the supposed Paraffin Deposit at Waiapu. 
By Wri Sxey, Analyst to the Geological Survey Department. 
[Read before the Wellington Philosophical Society, 20th August, 1881]. 
