NOTES AND QUERIES.

Otago Witness, Issue 3418, 19 September 1919, Page 39

NOTES AND QUERIES.

QMitlout lor reply In oomlng tasss lo be, «•• ' wlr«* >o* lawr th»n SATTJRDAT night Qnwstioa. will NOT b* »*pli»d ** thro*** *%• PC**- ' Constant Readee.—Any of the chemists in the largo centres etock the articles men- ; tioned in the advertisement you refer to. £ S—Thanks for drawing attention to the; 'typographical error. The Maungatapu j murders were in June, 1866. j Amateub.—Scaly legs in poultry are caused j by a mite which burrows, under the scales. . To cure this disorder make a mixture of j Bweet oil three parts, kerosene oil one part, i and work it well under the scales with a stiff brush. Abtist asks how to make pencil drawings indelible.——(a) I»a.y the drawing in a shallow dish and pour skimmed milk upon dti Any spot not wet at first may _have ,j the milk placed upon them lightly with a feather. When the paper is wet all over with the milk, take it up and let the milk drain off, and remove with the feather dirops which collect on the lower edge. Dry carefully, (b) Prepare water starch, in the manner of the laundress, of such j strength as/to form a jelly when cold, and then apply with a broad camel-hair brush as in varnishing, (o) The same may be j done with thin, cold isinglass water, or j size or. rice water. Fabmeb.—lron and steel can be prevented from rusting by dissolving Joz of camphor in lib of hog's lard, taking off the scum, and mixing in as much blacklead as will give the mixture an iron colour. Iron j and steel rubbed over with this mixture, j and left with it on for 24 hours, and then | rubbed -with a clean cloth will keep clean for months. Vaseline' will also keep off rust. ! W. 8., Dunedin, asks: "(1) How many people in and out of New Zealand hold property of any description (shares or otherwise) over £3000? (2) How many landholders in this country have over £3OOO worth of land —total amount in each case? (3) How much income and land tax is paid by these people, also their total incomes in each case?"—Most of the information you require was given in the issue of the Otago Witness of the 6th August, on page 8, and it is too soon to reproduce the list in detail L. C. H. J.—Mr H. M. Davey, consulting engineer, Princes street, replies:" Your sketches are now very clear, and I will try and deal with your questions. The pipe that is 2Jin in diameter if about a mile from the main intake should deliver about 85 gallons per mhuite. The line marked No. 1 is distinctly bad, an that there are the smallest' pipes for a considerable length in the middle of the line, with larger ones lower down; and, not only so, but the four bends you show certainly tend to make the supply less. In cases where a line of pipes were on the small size I have made the bends not only as easy as possible, but larger than the line they were in, with good results Therefore you might perhaps get about 230 to 250, gallons per minute delivered from it. The No. 2 line should give you about 450 to 470 gallons per minute I have been called in six times to see to increasing borough water supply, and on more than one occasion have seen pipe lines as if it was tried not to get the best results from them. In one line there was discovered a great quantity of lead that had been poured in to make a joint, and had got into the pipes. In your case the flat does not matter,'seeing it comes where the* pipes are ample in size, but under some circumstances it might have mattered considerably. It is regretted that you did not eay whereabouts the 2Jin pipe branohed off from; but this may be said: if it could

be moved up to branch off pipes of larger diameter the amount taken would not decrease the supply as much to others as it does now—that is, of course, if the water is in abundance at the .intake. Under similar conditions, if a 4in pipe would supply, say, 115 gallons in a given time, one sin in diameter would supply 201 gallons in the same time, so it is very easily seen what the 4in pipes mean to you. Also, say a Sin pipe has a given fall that would supply 201 gallons in a given time, one of 2|in diameter would give 35 gallons in that time. The usual difference in the delivery of pipes haying the same fall is about five and a-half times more delivery for a pipe twice the diameter. If you need further information, or if the above does not answer your questions sufficiently, write again. Call at the Queenstown .Post Office for a letter addressed to you."

Battery, Makomako, Pahiatua.—Mr H. M Davey replies:—"A sketch- of the essential items will-be sent you, and if or when you buy or get one of these, the sizes of it should be given, when a sketch of the other parts to suit will be forwarded. The most difficult type, pea-haps, to get would be the cylinder, which, as you will see when you . receive the sketch, is open at both ends; but if it can be got, either by. inquiry at suitable shops or by advertisement, it ■would make the cheaper and easier io make type of machine. If this, however, cannot be got, the alternative would be to the plate, which would be of plate glass, Bmooth at ' ihe rim, with a hole in the centre: and then the.other parts are easily made by anyone used to work with tools. Till you have the items, or at least one of them, a sketch would be useless, as the size of same has to bo known; so, when you have same, write again." Geometry, Geraldine.—Mr H. M. Davey replies:—"lt was renraxked that, if you were right-, as you may be, in the opening—viz., Lt-t x =l, then x- = 1 1 , which is 1 ; that goirg backwards x = /I. I think that will be so.