October i, 1885.] THE TROPICAL AGRICULTURIST. 



295 



respoudence with agents and absent proprietors etc. 

 about dams, rainfall, wheel-pits, relative cost of 

 steam, ttc., itc. But to the point : a 1(5 ft. water- 

 wheel with a given quantity of water gives l h. p.; 

 Uien a "20 ft. wheel with the same will give 5 h. p., 

 and a 21 ft. wheel will give 6 h. p. (allowance for 

 friction ttc. must be noted). Why, oh ! "D. K. M." ? 

 Because in the one case a weight has been acting 

 through a of fall IGft. and in the other through 24ft. 

 So you sec the diameter of the wheel is not '•ivallij 

 of .srco«(/<i)7/ importance." Try it on the weights of 

 yom- eight-day clock. This in regard to overshot 

 water-wheels of ordiuaiy construction ; re-action, 

 centrifugal and other forms of water-wheel or motor, 

 requires separate consideration. 



Mr. Editor, your idea of fly-wheels for Jackson's 

 rollers with water-power is good. A water-wheel 

 for ordinary purposes seldom requires a fly-wheel, 

 but in case of driving that roller, the advantage is 

 likely to be gi-eat. ]3y using a heavy fly-wheel at 

 high speed, you w-ill be able to run your water- 

 wheel at the lowest speed possible, and so utilize 

 the greatest possible amount of the available 

 power.— lours faithfully, WATEE. 



Rice. — The Dritish Trade Joiinuil sa.ys that "Kice 

 occuijies no less than one-half of the cultivated land 

 in Japan, where there are 250 varieties of seed. 

 Probably no country raises such a variety of legum- 

 inous plants for food." 



A Valuable Eejiedv foe Hkadache. — We desire to 

 call attention to a simple, and at the same time 

 wonderfully efficient, treatment for headache. We lay 

 no claim to originality, nor do we kuow who the 

 originator wa?, but having used it for a year or more, 

 and iu many cases with remarkable results, we feel 

 disposed to give our endorsement, and desire to make 

 it more generally known. The remedy is nothing more 

 nor less than a solution of the bi-sulpbide of carbnn. 

 A wiilemouth glass-stoppered bottle is half fiUed with 

 cotton or fine sponge, and upon this two or three drams 

 of the solution are poured. When occasion for its use 

 occurs the mouth of the bottla is to be applied to 

 the temple or as near as possilile to the seat of pain, 

 so closely that none of the volatile vapor ^ray escape, 

 and retained there four or 6ve minutes or longer. For 

 a minute or so nothing is felt, then comes a sense of 

 ti iigling, which in a few minutes— three or four usually — 

 bi'cunies rather serve, but which subsides almost 

 immeiliately if the bottle be removed, and any redness 

 of the skin that may occur will also quickly suiiside. 

 It may be reapplied, if necessary, several times in the 

 day. and it generally acts Uke magic, giving immediate 

 relief, ■\\'e believe this was the basis of a once popular 

 nostriun. The class of headaches to which it seems 

 especially adapted is that which may be grouped un-ier 

 the broad term of " nervous." Thus neuralgic, periodic 

 aud hysterical headaches, and even many kii.ds of 

 dyspiptic headaches, are almost invariably relieved by 

 it. True, the relief of a mere .symptom is quite another 

 thing from the removal of the i:ause, yet no one who 

 lus had the di.stress, and even agony, caused by .^evere 

 and frequent recurring headnches (and who has not seen 

 it ?) but will rejoice to be able to afford relief in so 

 prompt and simple a manner; besides, it is sure to 

 sccnre the hearty gratitude of the patient if he has 

 suffered long. As to the modus operandi we have 

 nothi..g more definite than a theory to offer, aud that 

 is that the vapor being absorbed through the skin 

 produces a sedative effect upon the superficial ncrve-s 

 of the parts to which it is applied. We know by 

 experiment that its influence is not due to its power 

 as a counter-irritant. We, however, kuow that it does 

 act, and if we do not clearly see iu whac wiiy it acts, 

 that is no more than can be said of several other 

 remedies which are firmly established in professional 

 favor and confidence. — rhi/iiciam' and Surgcom' Invest- 

 iyutor. 



Tea Witheking.— From the Loudon Tea Letter of 

 thaIiidianTeaPlantcfsGa:ctte\;eqnot(ie,s, follows:— 

 Mr. Greig— not the one already known to planters 

 —managing director of the Blackman Air Propeller 

 Co., is at work on an appliance for drawing off 

 moisture from wet leaf to assist withering, in which 

 appliance he proposes to use a Blackmail Air Pro- 

 peller. He has an initial effort on show at the 

 Preston meeting of the Royal Agricultural Society of 

 England, but it is too embryonic to allow of any 

 opinion being passed upou its merits as yet. This 

 much may be said, it is a step iu the right direc- 

 tion, and may have iu it the making of a success, 

 whicli is indeed much to be hoped, as some means 

 to properly effecting the end aimed at is bacUy needed. 



A VjILuable Discovery has been made in Cali- 

 fornia by a Mr. George Downie, of the efficacy of 

 Eucalj-ptus for removing scale from steam boilers, 

 which has proved to be of more than ordinary 

 value, so the San Francisco Xeics Letter says. The 

 Downie B. I. R. Co., of that city, to whom his many 

 patents from different countries 'have been assigned, 

 have ah-eady built up a thriving industry that gives 

 promise of attaiuiug much larger proportions in 

 the near future. At their works at Piedmont they 

 have ah-eady manufactured nearly 100,000 gallons 

 of the preparation from the Eucalj^itus for remov- 

 ing scale. A majority of the boilers, both on land 

 and steamboats, on the CaUforniau coasts, are using 

 the preparation, and the engineers speak of it in 

 very high terms. A good scale remover has long 

 been sought by engineers, and if this preparation 

 IS what it appears to be it will be a great boon. 

 — Leaders. 



Ceylon in the London Exhibition and Bibd 

 Life.— A home con-espondeut writes by the mail :— 

 " I read your article on tlio Exhibition with 

 pleasure as I quite agree in your views as to the 

 objects whicli should be exhibited, with the excep- 

 tion of stuffed animals which should be left to 

 India, unless indeed you could send a specimen of 

 an authenticated devil-bird, but that has yet to 

 come. 1 also much dislike the notion of at all 

 denuding our Museum, Remember Ceylon is being 

 visited by persons of all countries, and these visitors 

 will be m many cases grievously disappointed if 

 they find specimens which thev would wish to 

 study, removed. I greatly wish you had some very 

 active secretary going about and collecting such 

 articles as would be suitable.— I hear a very un- 

 pleasant account of the slips on the new line that 

 most of them might have safely been predicted as 

 being the results of bad work, I heartily hope the 

 extension will be placediu the hands of the P. W, D. 

 which will carry it out far more economically and 

 completely than any contractor. Pray keep ' pegging 

 away ' at the destruction of small birds in Ceylon. 

 It is both cruel and mischievous, and I have no 

 patience with the toleration of crueltv and mischief 

 in order to foster a stujiid and vulgar taste, I 

 hear it is expected that the Princess of Wales \vill 

 do her best to discourage this kind of finery as 

 heartless as it is underbred." 

 We entirely agree with our correspondent's sentiments 

 as to the barbarity involved in the destruction of 

 suiall_ birds merely to foster female vanity. The 

 case is bad euougii on the continent of Europe, 

 where the little birds are killed for food. As to 

 stuffed specimens, in any case, we should send the 

 birds figured in Legge's book as peculiar to Ceylon. 



FLIES AND BUGS. 

 Beetles, insects, roaches, ants, bed-bugs, rats mice 

 gophers, chipmunks, cleared out by "Rough on fiats," 

 W. L. Smith & Co., JIadraS) Sole Agents. 



