NOTES AND QUERIES.

Otago Witness, Issue 3489, 25 January 1921, Page 39

NOTES AND QUERIES.

Questions for reply in coming issue to be received not later than SATURDAY night. Questions will NOT be replied to through the post. Widow. —Apply to the Under-secretary for Immigration, Wellington. F. B. T.—lf the wood is sprayed with a mixture of benzine, five parts, and creosote, one part, it will destroy any borer, though, of course, we cannot give you any method of keeping the wood immune from further attacks. November, December, and January are the months to spray, and the ' wood should be treated three times. Burn all wood badly affected, and as soon as possible, or they will attack the new wood also. “Coitciias.” Pomahaka. —The agents of the “Varexo Steel Fencing Dropper” have not been located in Dunedin up to the present, but Wright, Stephenson, Dunedin, have, they say, a sample, and no doubt can supply you with all details. “Witness Reader,” Fairlie, writes inter alia,:--I have got a 3-year-old mare. Nine months ago she got caught by off hind leg in barb wire fence, got a deep wound halfway between hock and fetlock joint, on the front part of leg. I treated it with iodine for about feur months, and it eventually healed up leaving a mark or scar and a small lump. She then appeared quite sound and free from lameness. I put her into work two months later and the lump commenced to grow larger, and is now bigger than a gooses egg. She goes lame after a few days’ work. The lump feels hard, and is painful when touched. M hilst treating the wound on the mare’s leg I was also treating lump on temple of another mare. I put tape through with needle, and the lump went away after about three months and got right; but what I want to point to is I used some iodine and quill for both. Present lump on leg looks much like lump I mention on temple.——Agricola replies: The mare, being a good one, warrants attention of a veterinarian on the spot, as apart from value of mare, it is likely a case demanding a small oi>eration —removal, perhaps, of some foreign body, and cleansing, etc! There is not much chance, as you suspect. of any infection from mare's temple (on account of iodine) but the case any- , T Wa J. t TT Us r f J? r an incision by a,n expert. L. G. H. J., Arrowtown.—Mr H. -If. Davey consulting engineer, replies: —Your letteronly reached me just before closing time for the present issue. I was only able to inquire, but am told that the City Corporation is supposed to have the three sizes —namely, An, Im, and IJin. Knowing that you were interested, or had been interested. in 7m pipes, it was thought that you mignt be wanting the meters for these - J'"ur pressure—namely, about 1611 b per square inch, is the usual pressure of city water supply, so there should bo no difficulty nn that head, and you may expect to get prices in the nex-t issue. The folio ving information has just come in:—, o u could be supplied by the City Council with a second-hand British Guest and Chi-infos' Jin meter for £3 10s in Dunedin. I understand these meters register very well if sufficient quantities of water nass, but if less than about, say. 30 gallons' per minute pass, they are not so accurate, (hit is a reason why the rough approximates quantity was asked for Catt.ins, Tawanui. Mr* H. M. Davey, 64 Frederick street, replies: —I consulted’ t ho National Electrical and Engineering Company, Stuart street, and you would clo better now ii you dealt direct with them, 83 they can supply what you require. So far I have the following: —They consider that you would require nearer 80 than 50 b.b. power for the electrical energy you require. They say that you can get a variety of speeds in a dynamo depending

on your conditions, when these are fully known. They do not think you will ever be satisfied with the breast wheel you propose as to get anything like the power you want, it would, have to be so very wide to take the water, and your fall is so very low. I may add this —you speak of two heavy balance wheels, but it is not apparent what good they will do. Flywheels are of the greatest use for two things—first and chiefly for accumulating and storing power for such work as punching or where great power is required at intervals, and in a lesser degree for equalising the speed where the power is intermittent, such, for instance, as in a singlecylinder engine, but where both power and work are continuous their utility diminishes till it may disappear altogether. The Electrical Company also asks if it is not possible to do these things—to concentrate the water so as to use as much as possible, and to get a much greater fall than the 6ft you mention. Cannot you run the water in a race closer to the motor, and pipe it down, or is there no way of damming up tlie water or keeping it back, so as to get more power when working ? A rough sketch of the way you propose to lead the water would be of much help to them, I believe. If you write to them, ask them to ring me up and I will return your information to them, this will save you writing it out another time.