G82 
Report on the Exluhition and 
one end was one of Marshall and Son's six-liorse-power vertical 
engines, which drove a shaft running the length of the building, 
supplied steam for heating water, and for driving a small engine 
attached to the cooling apparatus. Along one side and end, 
under the projecting roof, the public could stand, and the re- 
maining side was provided with raised seats, so that those 
people who were specially interested could, on payment of a 
shilling, comfortably watch the processes, obtain information 
from the attendants, or instruction from the frequent lectures 
and explanations given by a competent person told off for 
the purpose, who thus supplied a want much felt on former 
occasions. 
The improved systems of setting milk, viz., Swartz and 
Cooley, which have been before described in the ' Journal,' here 
clearly showed their superiority over the old flat-pan system ; 
the Cooley, in Mr. Allender's opinion, being very suitable for 
small dairies, but for large concerns the Swartz is preferable. 
The water in the tanks was kept at about 40° by nleans of a 
cooling machine, such as is common in breweries, the low tem- 
perature being obtained by the evaporation of ether, pumped 
through pipes fixed in the tanks. 
There was nothing special to record about the churns or butter 
workers. 
In buying large quantities of milk it is practically found to 
be impossible to get accurate results by measuring, so a machine 
has been invented by Mr. Allender for weighing it, by which 
means the quantity to an ounce is quickly and surely known. 
It consists of a weighing-talile about 3 feet 6 inches square ; on 
this are two y\-frames, between which is supported, on trunnions, 
a copper tank, holding 35 gallons, or about 3 cwt. of milk. In 
one half of this is fitted a wire strainer, 80 meshes to the 
inch, through which the milk is poured. The tank being 
full, the contents are weighed, a catch is released, and the whole 
tipped up into a tank on the floor, from whence it is used as 
required. 
Another new machine is the Aylesbury Dairy Company's 
Patent Butter - mixer, which has several uses— as mixing 
salt with butter, and washing salt out of butter — but its chief 
purpose is for mixing butyroseter, or the new butter preservative, 
with the butter to be so treated. It consists of two fluted rollers 
of wood, through which the butter passes into a pug mill below, 
the knives of which are of wood and can readily be taken out 
and cleaned ; the machine is driven by power, and is capable of 
getting through a large amount of work in a short time. 
Two Centrifugal Separators (Laval's patent) were also shown 
at work, and were fully described in last year's ' Journal,' — most 
