NOTES AND QUERIES.

Otago Witness, Issue 3160, 7 October 1914, Page 47

NOTES AND QUERIES.

Questions for reply la coming Issue to bs fO calved not later than SATUEDAY night. S. E. M.—The sample of material sent by you for identification was forwarded to Professor Park, Director of the School of Mines, who states that it is a fragment of a boulder of granite, in which the grey scales of muscovite mica are a most conspicuous constituent. C. R. E. M.—The sample of material you sent for identification was forwarded to Professor Park, who has reported that it is a decomposed gxeywacke, a variety of sandstone usually associated with formations of great antiquity. Mokoketa.—A. Tiltman, George street North, Dunedin, is a purchaser of the articles you refer to. J. D. S. wants to know the year in which the last Exhibition was held in Wellington?- 11 —1885. J. B. L., Waikouaiti—The first gathering held on the Caledonian Society’s present ground was the Fire Brigades’ demonstration on Boxing Day, 1876. The Dunedin team won the hose and reel competition, but the names of the men comprising the team were not given in the report. The winner of the Men’s Walking Race at the New Year sports the following week was M. Carr on the first day and Campbell on the second day. The only evem in ■winch G. Kerr is mentioned is. the- Youths’ Handicap Walking Race, one mile, in which he started scratch and came fourth. F. S., Bushey Park.—The length of the rails on the main railway line is 42ft, and the weight 70lb per yard. _ On the electric tramway system in Dunedin the length is 40ft, and the weight 951 b per yard. Dairymaid.—Milk fever; Allowing the udder to become full and not reliev,n 5 ... -insure uy miming is now generally accepted as the most likely means of prevention. This view is taken because distension, artificially, acts as a cure. It is considered that the good effects of injection of the udder are chiefly due to the restored pressure, wltether this is accomplished by air, by oxygen gas, or by fluids sent in. A eomewhat lax condition of the bowels arcl not too high feeding is generally re&wcdcd as good management. Windmill, Windsor.—Mr H. M. Davcy replies: —“Possibly not much, as the trouble in the delivery of water does not begin practically till the water travels at over, say, about 3ft per second through pipes. At this speed the lin pipe would deliver about six gallons and the larger one about nine gallons per minute. The greatest thing in such a long length, and where pumped to such a height as you mention, would be to have the pipes as smooth as possible internally. It may seem, perhaps, but a small thing; but in iron pipes, what with the pressure in screwing and the cutting off by pressure also, there is a decided "contraction in every pipe-end. and this gathers any small substance if it gets the chance, and a lot of friction in long lengths, as well as the contraction mentioned. If not for the trouble, each pipe-end should be countersunk a little to obviate this.” H. C. G. Russell. —Mr H. M. Davey, Princes street, replies:—“See also reply to ‘ Windmill ’ as . to the proper speed of water through pipes, which in vour case meroW means that if it goes quicker you begin to lose the advantage of it as regards efficiency. You would therefore get about 16 cubic feet per minute through the smaller pipes, giving about 3 b.h.p. and about 35 to 36 cubic feet per minute, giving about GJ to 61 b.h.p., through the larger ones at that speed. There is, however, no doubt that if you have plenty of water you might get more power from either line of pipes than stated above, but such would be more or less wasteful and less efficient for the quantity you use.” Constant Reader. —Under the circumstances

mentioned b5 r you it would be possible to get a certificate for passing the P ourtli Standard without having- to sit for another examination. There is always more or less demand for platelayers, surfacemen, etc. On application to the nearest railway station the stationmaster will supply you with a form to fill up. Argument. —The official record for the running high jump is Gft Tin.