NOTES AND QUERIES.

Otago Witness, Issue 1851, 30 March 1904, Page 47

NOTES AND QUERIES.

Questions for reply in comiiig issue to be received not later than MONDAY night..

EC, Dunback.— Mr H. M. Davey, consulting engineer, kmdly replica-— We are glod that •the reply was a3 you required, and in answer to your present letter may say, it was thought ■that your original power was steam, and, as before explained, the present, or lather the old, methods of naming the power of- these, •which has not yet quite died out. is often cnoat' misleading ; but of course your power •will bo what you said it was, or at anyrate less rather than more. Had you told m&. or if you tell me, the speed of water in any bos, together with tho~ width" of the inside of the box (in v_our case 4£in), and tha depth of the water, then it can ba measured, and you •will be told the amount. Another way would Tie to teH the depth of water flowing over a ■weir of wood or metal, thinned at the edge, together with -the width of said weir, when in either case th© amoim*. could ba givan you. A Government head cf water is one cubic foot, or, roughly, about 6.J gallons per second. Still ano'Jber way to get at a small water «upp]y woald be to Jet it run into 'a watertight box or case, staling, for instance, that in so many seconds a box of such a length end such a width was filled up to such a depth of water, and then the amouut would be told you. Re cost, a maker will be asked, to communicate with you. If, as seated, you make a wheel to use 70ft (or rather over a Lead) of water per minute, you would need ■with yoyx low fall a nozzle of about 2Jin in diameter, but till you measure your water you do v not know whether you have that amount or not. _^If, therefore, you do this,

fuses at 53-icZp-g (290cfeg C), and at red heat becomes volatilised. I + is used to produce green light in fireworks, and is employed to render glass highly refi active. It forms a. number of compounds, mcludirg- three oxides. Probably Messrs Kempthorne Prosser, and Co., Stafford street, might ba atf c to give you an idea of its value. ('2) App*y to have the patent medicine regic-tered under o trade mark. Forms of application maybe obtained by writing to the Registrar of Trade Maiks, Wellington. (3) You omit to state what kind of spirits. For your guidance, however, it may bo meniioned that medicine is deemed to ba illegally adulterated (?) if, when Fold undor or by a name recognised in the British Pharmacopoeia, it differs from tho standard of strength, quality, ar purity laid down therein , (b) if, when sold under or by a. namo not recognised in the British Pharmacopoeia, but which is found in some other pharmacopoeia, or other standard 1 work on Matoria Medica, it differs materially tfrom tihe strength, quality, or purity laid down in such work; (c) if its strength or purity fall below the professed standard under which it 13 sold. A. M. M. — We should say the better plan would be to simply address her as "Mrs Smiih." The use of her own Christian namo wou'd nob necessarily imply that she is a widow, a3 some advanced women adopt the American . style of using their own Christian names notwithstanding the fact that their husbands are alive. Subscriber, Oiepuki. — (1) The method of pitting apples was advanced some years ago, but local experiments weie anything but successful. It is much better to store them on. shelves in a coal shed, wilh a free currenb of air going th-ough it, watching carefully for any that show sigrs cf decay. (2) -Mourning nauer is suidod by the period of mourn-

Kelso.— Address your letter to the Minister of Agricuiture, Ottawa, Canaan. Interested. — We do not understand your paragraph. You mention no district so far as we can moke out, and do not say " Royal Prince " is. A.M. — A good recipe for harness i olish is the following. — Four ounces glue, 1J pint vinegar, 2oz gum 'arabic, \ pint black ink, 2 drains isinglass. Break the glue in pieces, put it in a basin, and pour over it about a pint of the vinegar ; let it stand until it becomes soft. Put the gum m another vessel, with the ink, till it is perfectly disso.ved; melt the isinglass in a.s much water as will cover it, which may be easily done by placing the cup containing it jiear the fire about an hour before you want to use it. To mix them, pour the remaining vinegar with the softened glue into a saucepan upon a gentle fire, stirring it till it is perfect'y dissolved, that it may not burn to the bottom, being careful not to let it reach the boiling point-^about 180 Fahr. is the best heat. Next add the gum, let it arrive about the same heat again; add the isinglas=. Take from the fire, and pour it off for use. To use it, put as much as is zequired in a saucer; heat it sufficiently to make it fluid, and app'y a thin coat with a piece of dry sponge; if the article is dried quickly, either in the sun or by tho fire, it will have the better polish. This answers .equally well for boots or shoes. Straw. — The Whitman's Hercules baling piets is one of the best on the market. Messrs Nimmo and Blair, Dunedin, arc the agents. Accumulator. — The jelly you mention is 1 a solution of gelatine, and is often put in, the calls to render them more portable and less liable to spill over. Messrs Turnbull and Jones, to whom, we referred your Question.

brake horse-power with the fall you say you have. (2) A 2ft 6in Pellon -. heel would do. Such a wheel is priced £38 in England. (3) The speed would be about 300 to 310 revolutions per minute. Of course, ycu could have a 'far larger wheel, and it, would work slower; some persons prefer cue kind and soms prefer the other, but it principally depends on the speed c-f the macliinoiy you drive. For instance, if it were such a machine as a sepaiator or a £aw, the small wheel would be preferable, while if it were some slow machinery, it would be a calculation as to whether the larger and slower wheel would not save enough intermediate gearing to counterbalance its extra cost, as compared with the small one.