Report on Miscellaneous Implements at Newcastle. 199 
upon either of the drawings, balances the hurdle, and when this is removed 
the weight in question is taken off also, the platform, without the hurdle, 
being thus instantly equilibrated without the chance of error arising in 
making a special adjustment. 
In Class 8, the prize of 25/. for a one-man power Cream 
Separator, price not to exceed 20/., and to be capable of dealing 
with 20 gallons of milk per hour, fell to G, D. Laval's Hand- 
power Separator (Art. 971), exhibited by the Dairy Supply 
Company, of Museum Street, Bloomsbury, London. 
Fig. 3 below shows the general appearance of the Laval 
Hand Separator, whose various parts and their action will 
be readily understood, without 
further explanation than the Fig. 3. 
drawing supplies, now that the Laval's Ilancl-poicer Separator. 
centrifuge is so well and gene- 
rally known. 
This machine, when under 
trial, separated milk at the rate 
of 23|- gals, per hour, one man 
turning the machine for 41 
minutes 45 seconds, at the rate 
of 40 revolutions of the handle 
l^er minute. At this speed, the 
milk-vessel made 6,400 turns 
per minute, and the work did 
not appear hard for the man. 
Dynamometer tests demon- 
strated that the machine ab- 
sorbed 4,455 foot-pounds of 
energy per minute, which may 
be considered as a moderate 
efibrt for a man working in 
short spells of, say, one hour, 
seeing that a man can exert 
about 3,200 foot-pounds of effort 
per minute, working 8 hours a day on a winch. 
The separation was good, but the milk unfortunately not 
in good condition, so that particulars of Dr. Voelcker s analysis 
of the skim-milk are omitted as likely to mislead. There was 
great difficulty in getting milk in proper condition at the New- 
castle Show, owing to the distance of the source of supply. 
Two other hand-centrifuges, viz. Laval's Horizontal Separator 
(Art. 972) and the "Danish" Hand Separator (Art. 721), the 
former exhibited by the Dairy Supply Company, Limited, and 
the latter by the Aylesbury Dairy Company, Limited, were 
entered for competition, The " Danish " machine was accident- 
