NOTES AND QUERIES.

Otago Witness, Volume 14, Issue 2648, 14 December 1904, Page 47

NOTES AND QUERIES.

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

Constant Eeadee. — Mr H. IT.- Davey, consulting engineer, Moray place, kindly replies: — (1) If your engine is in order and well made, it shoitld develop 6 indicated horse- power,bu t j'ou can spfely calculate on, say, 5 h.p. (2)~ You ask "how many miles the above engine will drive, etc," and. of course, the only answer possible to such a question would .be that it will drive till it is out of order, or till it breaks down, but it is more thara probable that what you intended to ask was, how many miles an hour would it drive? seeing that you give certain figures for this calculation. Wei], not allowing for slip, which you may get under some circumstances more or less than under others, you would travel from about 7| miles per hour at the slower speed you mention to about 9 miles per hour at the quicker speed you mention, and, finally, the affair certainly ought to be able to carry the number of persons you mention. F. B.— Mr H. M. Davey replies:— The fall you seem to require is about 4ft to a mile, or 1 in 1320, and to bring it to working measurement it works out at one-eleventh of an- inch to the 10ft straight edge. Now, had you given the quantity of water and the state of the country in which your race was to go, you might have been given the size of same. It might, however, give you an idea to say that if you make a good race, not too sharp bends, or, if so, then making th&rn wider and deeper, you may expect to be able to deliver about from 2| to 3? heads if your race is evenly cut 18in wide and 18in , deep, the differences being for the different sorts of country a race is cut in. If this is not enough guide to you, write again. T. M'G., Mikonui. — Mr Davey replies: — If it was made to read that the pumps could not

take stones of 6in or even more, such was not intended; but what was intended to be conveyed was that for such pumps as you mention, I thought that a wide casing, so that the stones could get away from be- j tween the vanes and between it and said casing, would cause less friction and be better for your purpose. The late Mr Perry invented and designed pumps made in this way, and they were represented to me to j be very good for this class of work. It would be a very good thing if you or E. were to state tne make of pump from America that works so well, as otheis may like one if they knew how it acted. I will go to the place you name in the meantime. A good make is worth looking to, for, as you say, many are comparatively of but little use. Eeta asks if any reader will supply her with his experience of "The Common Sense Cream j Separator." j Regular Reader.— Dr Touey's address is \ "Care Messrs Morgan and Scott, Pateinos- i ter road, London." j IiUCHJATE writes : — In reference to the alluvial gold diggings in Rhode?ia, Africa, are the conditions and regulations anyway simi'ar to what they are m New Zealand? Can any returned South Airican afford the in- , formation desired? Lake County. — The local authority having charge of the road may authorise any person to impound cattle which at any time of the day or night may be found wandering at laige, stinying in, lying about, or tethered on the road. But cattle owned by ai.y licensee of Ciown lands and depasturing on a road within a run over which the licensee has a right of pasturage cattle, the owner of which has received permission from the local authority to graze them on tiio road, and cattle depasturing on. a road J

unfenced on either or both sides and bounded on both sides by land of the cattle-owner, cannot be impounded. H. C, Fortrose. — Mr Davey replies: — To make a brake for obtaining the brake horsepower of any motor fiom man power tipwards, proceed thus: — The brake may be as rough as you like, its object merely being to slow the motor perceptibly. Take, for instance, a suitable beam, and xoughly hollow slightly near one end to fit a little to the shaft or pulley you intend to apply the brake to. A short chock, also slightly hollowed, with two bolts, the whole resembling a bearing with the lever standing out so that when the bolts are screwed down the motor is slowed. It will be seen that the strength of the beam and bolts entirely depends on the power of the motor If not powerful, ?,in to %in bolts would probab'y be sufficient. Now, measure from the centre of the shaft to a convenient point near the outer or far end of the lever, and for convenience of calculation make this point an even number of feet, say Bft of lift, etc.; not, for instance. 7ft 6£in, for that would be more trouble to calculate. At this last point have a spring balance or a scale end and weights handy, but before applying the spring balance, or, if a scale end, before putting in any weights, set a basr of stones or sand, etc., to counterbalance your lever, otherwise you will have to calculate its influence, whereas with a balanced lever the calculation is simpler. When all is ready, and a block or something placed to only allow the lever a convenient amount of inlay — and. in some cases, the ground wou'd do for this stop — start the motor, then giachially tighten the bolts till the motor perceptibly slackens, when you apply the balance or weights, and at the same time count the revo l utions per minute. It does not matter if you decrease the revolutions, much or iittls, for the jnore you decrease the more weight or spring power is required tc do it. Now for <he calculation: — The British horsepower equals .0001904 m t>. Now, "r" is the distance in feet from the centre of the shaft to where the spring balance or scales

is applied ; "n" is the number of revolutions per minute; and "p" is the pull in pounds by the balance or weights. Supposing the length of the lever were 10ft, the number of revolutions 100 per minute, and the pull 1001b, then you get 1001b 100 revolutions per minute 10000 10 length of lever in feet ' 100000 I .0001901 ] 190400000, which, cutting off the 7 points, makes 19 horse-power, which is the actual power clear of all friction, so that if you take this at the motor when ungeared, and again at the end of the shafting or gearing, you will find exactly the power required to drive the gearing, or any machine you may have attached at the time. I trust this will ; be clear to you. j A. D. — The son is entitled to two-thirds of the j property and the husband to the remaining ! one-third, in accordance with the scale of ' distributions laid down in section 3 of "The Administration Act 1879, Amendment Act, 1885.' Weekly.— The number of hours to be worked j weekly is entirely a matter of arrangement I between employer and emrjloyee at the time the latter enters into the engagement. There is no limit pivscnbe-d by Inw. Strawbehry, Cambrians. — (1) Judging from the remains of the insert in your peach leaves, it is the green fly. The whole of these were, however, crushed and dead on leceipt of specimen. Syringing your tree well and frequently with soap suds in dry weather is the best cure. On the scant in- j

formation supplied, no reason can be given for the peaches turning black. Perhaps something in the, soil is the cause, or a sharp frost may have done the damage. If the matter is serious report it to the Department of Agriculture, Wellington, and the inspector will be sent to examine.— M. I. (2) For ginger beer put the thinly-peeled rinds of four lemons into an enamelled pan, with the strained juice, 2oz bruised ginger, 2£l'b loaf sugar, and half an ounce of cream of tartar. Pour over these ingredients 2J gallons boiling water, and when lukewarm add two tablespoonfuls of brewers' yeast. Stir the liquid and leave it to ferment until next day. Skin the yeast from the top, pour the beer from the pediment, and bottle for use. Let the corks be perfectly sound; put into boiling water first before being used, and then securely wire down. The beer will be ready for use in two days. A. H. — The amaryllis stands our climate very well, and you may safely take the risk of planting it out, potting a few 1 and keeping them in the frame for your own experience. For cabbage, Enfield Market, and cauliflower, Eaily London, are most suitable, sowing both early in Januaiy. — I. M. I. F. H. T., Zululand.— We have submitted the specimen to Dr Benham, Otago Museum, who kindly replies that it is a specimen of "hawk moth," of which there are many kinds in all parts of the world. Lime. — Will be replied to by "Agricola" in "Notes on Rural Topics." Twenty Years' Subscriber, Outrarn. — (1) The Chief Justice of New South Wales is Sir F. M. Darley, salary £3600 per annum ; Acting-Chief Justice, Hon. M. H. Stephen, £1500; puisne judges, Justices Owen, E. B. Simpson, Walker, -and Pring, £2600 a year each. "Victoria : Chief Justice, Sir John Madden, £3500; Justices Williams, Holroyd, A'Beckett, Hodges, and Hood, £3000 a year each. Sotith Australia: Chief Justice, Sir S. J. Way, J2000; Justices Boucout and Bnndey, £1700 each. QueenslandJudges Cooper, Peal, Chupp, and Power. West Australia: Chief Justice, Sir E. A.

Stone ; Justices Hensman, Mooihead, and Parker, £1400 each. Tasmania: Chief Justice, Sir J. S. Dodds, £1500; Justices M'lntyre and Clark, £1200 each. (2) The New South WaletJ Agent-general is the Hon. H. Copeland. (3) The Federal judges are Sir Sam. W. Griffith, Chief Justice, and Judges Barton and O'Connor. (4) Probably in Kalgoorlie, W.A. ; boundaries unknown. No name yet suggested. (5) The successor to Bishop Moor, ~of Ballarat, has not yet been named. (6) Right Rev. Dr O'Connor ( is the new bishop of Armidale. I Canibell. — We are not able to give you the i information you ask for. "Write to the Lands Department at Invercargill, Dunedin, Christchurch, and Nelson, and they will forward you pamphlets and all details available. Miner, Gore. — Yes, so far as we know, except in small quantities bought by jewellers, etc.