Page 18 Advertisements Column 1

Otago Witness, Issue 3415, 29 August 1919, Page 18

i 6 DOW! versus A GREAT amount of controversy has come about lately as to the relative efficiency of the two methods of skimming used in separators of various makes. As a matter of fact, the same basic -principle —viz., the tendency of the cream to travel to the centre and the heavier skimmed milk to flow to the outside, underlies both systems. After a great amount of experiment the manufacturers of the well-known Velox machines found that for separators up to 50 gallons per "hour capacity, the link-blade bowl had many advan- . tage3 over the di3c bowl. In the disc bowl it is most essential that the layers of milk be very thin, otherwise the milk will sliclfe, and not revolve at the same, speed as the bowl. Moreover, the distance between the plates must always be the same. For many reasons it happens that in smaller sized separators the layers do not remain the same. Take two layers of milk, one say twice as thick as the other. Precisely tho same force—viz., the friction between the disc surfaces is to bring the bigger quantity of -milk into rotation as the smaller quantity. What happens? Obviously it requires double the time. With a few inaccurate layers the capacity of the separator is first of all reduced, and, secondly, on account of these varying currents in the bowl, the skimming efficiency is reduced. Now to the Link-blade system _ In this bowl the milk is brought into rotation mechanically, and as soon as it comes between the discs it must revolve at the same speed as the bowl, thus ensuring the necessary centrifugal force. On account of this mechanical action it is possible (and this is a great advantage) to have a larger spacebetween the blades, consequently fewer plates and a smaller bowl. With fewer plates they can be made of stouter material, and this is why the link bowl can be guaranteed as long as the frame itself. At this stage attention might also be drawn to the point that, in the link bowl, all the blades are connected on a ring, and, therefore, always kept together. They are easily inserted into the bowl, whereas the plates of smaller sized separators are always troublesome to assemble, and. in consequence of what has been said before, must be of flimsy material. With tho mechanical action of the link-blade bowl, full service of each layer is ensured, whether the distances between the plates are accurately the same or not. Herein lies another great advantage. All Velox separators up to 50 gallon capacity are constructed on the linkblade system. Those of larger capacity are on the disc system, because they can be made more strongly and accurately than the smaller sizes, and, therefore', the advantages apparent when the question comes to the smaller sizes are lost. Farmers have told us in regard to spme other makes, that they df come up to their rated cap; Beware when you buy a separate w say 18 gallon capacity that you don't really get one of only 15 gallons. Make sure. Don't be misled. Our confidence in the Velox is such that we are prepared to give you one month's free trial on your farm. Thisoffer is genuine—it is straightforward. Choose the separator you want, and write us. You can have any Velox outfit on one month's free trial —freight free. Work it under your own conditions, and after four weeks make vour decision. Prices : J £ s. d. Size 00 lOgal per hour ... 615 0 „ OA 15gal per hour ... 910 0 .. 1A 270al ner hour ... 14 10 0 38 0 0 Size 00 lOgal per hour ... 615 0 „ OA 15gal per hour ... 910 0 „ 1A 27gal per hour ... 14 10 0 „ 2A Hand—sogal per hour 25 10 0 „ 2A Hand and Power —sogal per hour 29 0 0 „ 3 A Hand—B2gal per hour ..'. 38 0 0 „ 3A Hand and Power 82gal per hour 42 10 0 „ 4A Hand—llsgal per hour 48 10 0 „ 4A Hand and Power —llsgal per hour 53 10 0 High Stand OA and 1A ... 110 0 „ „ 2A and 3A ... 2 5 0 ~ 4A ... 210 0 Rattray Street, Dunedin. MSSn m£a

THE CHRISTCHURCH GAS, COAL, AND COKE CO., LIMITED. REGISTERED OFFICES, 77-79 WORCESTER STREET, CHRISTCHURCH. AUTHORISED CAPITAL ... j 5320,000 CAPITAL SUBSCRIBED ... £243,275 RESERVES. RESERVE FUNDS £156,763 mHE CHRISTCHURCH GAS COM-.. •*• PANY are offering a first issue of £50,000 in 5£ per cent, debentures FREE OF INCOME TAX. The Debentures will comprise 500 of £IOO each, having a currency of 15 years from the Ist November, 1919, bearing interest at the rate of 5g per cent, per annum Free of Income Tax. Coupons will be attached to each debenture, and interest will be paid half-yearly. The rapid and continued., expansion of the Company's business necessitates important extensions to the Plant to meet the ever-growing demand for gas, and in addition to calling up fresh capital the Directors have determined to offer the investing public an opportunity to subscribe for these debentures, which will be secured by Trust Deed over the Property of the Company. Applications may be made at once s on forms to be obtained from the Company's office, . 77-79 Worcester street, Christchurch, or the office of • this paper. Priority of application will receive idue consideration. By Order of the Board of Directors, R. C. BISHOP, . General Manager. 18th August, 1919.