October i, 1885.] THE TROPICAL AGRICULTURIST. 



295 



vespoudence ynth agents ancl absent proprietors &a. 

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

 steam, Ac, etc. But to the point : a Hi ft. water- 

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

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

 and a 2i ft. wheel will give 6 h. p. (allowance for 

 fi-iction etc. must be noted). Why, oh! "D. K. M." ? 

 Because in the one case a weight has been acting 

 through a olfaU 10ft. and in the other through24ft. 

 So you see the diameter of the wheel is not '•raillij 

 of secondari/ importanci:." Try it on the weights of 

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

 water-wheels of ordinary 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 great. By using a heavy fly-wheel at 

 high speed, you wiU be able to run your water- 

 wheel at the lowest speed possible, and so utilize 

 the greatest possible amount of tlie available 

 power. — Yours faithfully, WATEB. 



Bice. — The British Trade Joia-nal s&js that "Rice 

 occupies 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 ViLUABLE EEitEDV FOE Hkadache. — Wc desire to 



call attention to a simple, and at the same time 



wonderfully eiBcient, treatment lor headache. We lay 



no claim to originality, nor do we know who the 



originator was, but having used it for a year or more, 



and iu many cases with remarkable results, we feel 



disposed lo give our endorsement, and desire to make 



it more generally known. The remedy is nothing more 



nor less than a solution of the li-sulphide of carbon. 



A widemouth glass-stoppered bottle is half filled with 



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



of the solution are poured. When occasion fur its use 



occms the mouth of the bottle is to be applied to 



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



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



and retained there four or five minutes or longer. For 



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



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



becomes rather serve, but wliicb subsides almost 



immediately it the bottle be removed, and any redness 



of the skin that may occur will also quickly subside. 



It may bo reapphed, if necessary, several times in tlie 



day, and it generally acts hke magic, giving immediate 



relief. We believe this was the basis of a once popular 



nostrum. 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 kiiids of 



dysprptic headaches, are almost invariably relieved by 



it. "ri-ue, the relief of a mere symptom is quite another 



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



has had the distress, and even agony, caused by .-cvere 



and frequent recurring headaches (and wbo has not seen 



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



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



secure the hearty gr.atitude of the patient if he has 



suffered long. As to the modus operandi we have 



nothiug more definite than a theory to offer, and that 



is that the vapor being absorbed through the skin 



produces a sedative effect upon the superficial nerves 



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, know that it does 



act, and if we do not clearly see in wbac way it acts, 



that is no more than can be said of several other 



remedies which are firmly established in professional 



favor and confidence. — riiysicUms' and Sioyeom' Ini'est- 



iyaior. 



Tea Withering. — From the London Tea Letter of 

 the Indian Tea Planter's Gazette we quote as 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 oft' 

 moisture from wet leaf to assist withering, in which 

 appUance he proposes to use a Blackman Air Pro- 

 peller. He has an initial eft'ort 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 upon its merits as yet. This 

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

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

 which is indeed much to be hoped, as some means 

 to properly eft'ecting the end aimed at is badly needed. 



A Valuable Discovery has been made in Cali- 

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

 Eucalyptus for removing scale from steam boilers, 

 which has proved to be of more than ordinary 

 value, so the San Franrisco Neu-s Letter says. The 

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

 patents from different countries have been assigned, 

 have already built up a thriving industry that gives 

 promise of attaining much larger proportions iu 

 the near future. At their works at Piedmont they 

 have already manufactured nearly 100,000 gallons 

 of the preparation from the Eucalyi:)tus for remov- 

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

 and steamboats, on the CaUfornian 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 nj the London Exhibition and Bird 

 Life. — A home correspondent writes by the mail : — 

 " I read your article on the Exhibition with 

 pleasure as I quite agree in your views as to the 

 objects which 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 authentieated devil-bird, but that has yet to 

 come. I 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 in many cases grievously disappointed if 

 they find specimens which they 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 placed in 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 cruelty and mischief 

 in order to foster a stupid and vulgar taste. I 

 hear it is expected that the I'rmeess of Wales will 

 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 

 small birds merely to foster female vanity. Tlio 

 case is bad enough on the continent of Eiu'ope, 

 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 Rats." 

 W. E. Smith & Co., Madras, Sole Agents. 



