ORE 



I'ivcd from the more extenfive ciikivatioB of fuch greCn 

 crops as the winter fiipport of the (lock. 



And crops of this natnre have likcwife been found of ex- 

 tenfive utility in the feeding of niileh-cows in winter dairying, 

 as is fully iliewn in the various trials made bv J. C. Curwen, 

 clq. in a northern drilricl; of the kinjrdom, in the view of 

 fupplying the poor of a large town with milk. The value 

 of which crops in this fort of application, on the fuppoli- 

 tion of their being fold to the cow-keeper, and the expences 

 of their cultivation, are ilated in the following manner. 



Green Crops. 



Twenty-two acres of green crop, at lol. 1 

 pt-r acre - - - J 



Expences of ra'ifin^ and cleaning 



Four acres of cabbages, 1 „ 



at 1 2/. per acre j "^ 



Tv.o acres of Suedilh tur-1 



. , ^ !- 10 o o 



nips, at ^l.pcr acre J 



Six acres of common redl 

 turnips, at 4/. per acre j "''■ 



One acre of Kahlrabi - 500 



Nino acres of rape or cole, " 

 at 3/. lot. per acre 



£. 

 220 



31 10 



iiS 10 



lain on crops £. 10 1 10 



It is confidered that tlie improvement of the land, and the 

 value of the fucceeding crops, are fully adequate to the rent 

 and taxes. 



This ftatement mews in the mod clear psint of view the 

 vail benefit of this kind of crops even in this fort of appli- 

 cation, and that they Ihould not be difren'arded by t'lole cn- 

 g iged in the builnefs of huihandry. But in fome other 

 niudes of application they will be found far more important 

 and bcnelicial. 



Cy fome they have alfo been confidered as of great utility 

 wiei turned into the foil by way of a manure, though others 

 are wholly of a different opinion ; probably in conlequcnce 

 of the trials ha\i'ig been made in very oppofite defcriptions 

 of foils, and imder very different circunillances of them. 

 It is extremely probable, likewife, that the advantage of 

 this praclice will be much greater where the crops are turned 

 in during the fummer months than in othci' cafts, in confe- 

 q'.ience ot their running more quickly into the putrefaftive 

 tlatc. It has been advifed.that whatever mav be the nature 

 of tlie crops, they fiiould be ploughed uudcr by means 

 of a fkir.i-coulter plough, as conftituting tlic only means of 

 turning them in, in fo complete a manner l'.s wholly to con- 

 ceal them. And that, in cafe of fowing the land ^\•ith broad 

 raft turnips, the work (hould be performed at leaft three 

 weeks before the feed is put into the foil, and that it Ihould 

 be afterwards only very flightly harrowed in. See Turning 

 in Gre.n Crops. 



Gnr.KX Earth, in Mineralogy, Bahhgee, SaufT. ; Chlcrilc 

 i ale/ogee, Uron^.; ylrgl//eiverc::c:i/is,\V'^cn.; Griiii:ri'e,Wern, ; 

 'j ii/c c/j/orile zogr,ip/}i'/ue, Vj.'d'.\y ; Verde di Verona, Verde di 

 Iirentomco,\t^\. ; Veronefe cntli, an earthy fub fiance belong- 

 :ng to the argillaceeus genus. Its colour is iudicr.ted by its 

 r.amc, but there are feverid fhades of it, the principal of 

 which are verdigris, and celadon green, paffi-ig fometimes 

 into leek and mountain green, frequently with an admixture 

 of grey ; it has alfo been obferved of a more or lefs pure 

 <'live green. 



e R E 



It occurs maflive and diifeminated, in rounded and angii- 

 lar fragments, and in globular concretions ; likewife in grains 

 mixed with fund, and as coating on agate lialis, in the liol- 

 lows of amygdaloid, (toad-ftone,) &c. Internallv it is duU, 

 but on the rifts a fat-like lullrc is fometimes obfervable. 



Fracture finc-ranliy, or more or lefs fiat conchoidal, ap- 

 proaching to ilaty. I3i\ifible into indctcrmiwatcly angular, 

 blunt-edged, opaque fragn-icnls. 



It feels ratln;r grcafy, is al.vays more or Itfs foft, mild, 

 and eafily frangible ; llreak ratlier fliining ; adhefion to the 

 tongue iiiconlideraLle. Specific gr;;vity about 2I,, 

 _ y Ije chemical charac'.ers of green-earth, derived from 

 Klaproth's anjlylis of three varieties, j;s. thofe from Monte 

 Baldo, in the Veronefe, from Cyprus, and from Eail Pruf- 

 fia, are the following : 



The green-earth from Monte Baldo, when heated to red- 

 nefs, loles 'iv/. per cent, of its weight, while its hardnefs ii 

 conliderably increafed. The fragments thus fiibjcded to 

 the lire become externally of a yellowiP.i-brown colour, inter- 

 nally greyiih-black and glillening. That of Cypruf, after 

 ignition, lofes eight parts of its weight ; and its colour is 

 converted into dirty brownifli yeilov.-. Expofed to the fire 

 of the p< reelain furnace in the charcoal crucible, it fufcs 

 to a fomewhat porous greenilh glafs, externally of a dirty- 

 green colour, internally of that of emerald ; in the clay cru- 

 cible it is converted into a greenifii-grey fiag. The green- 

 earth of New Fall Pruffia, when freed from the admixed fand 

 by elutrition, and ignited, changes its green colour into light 

 leather-brown ; the conglomerated particles are converted 

 into a hard mafs, and thus lofe nine per cent, of their 

 weight. The acids do not ack upon green-earth, and they 

 leave its colour unaltered. 



The reiults of the analyfes of the above three varieties 

 were : 



Green-earth of Monte Baldo, 

 iu the Vert/ncfe, 



Silica - - 53 



Oxyd of iron - 2S 



Magnefia - 2 



Kali - - 30 



Water - - 6 



Lofs - - 1 



Green-earth of Cyprus. 



Klapr. Beitr. vol. 4. ico 



ibid. 



51.50 

 20 50 

 1.50 

 I?. 



.50 



ICO 



ibid. 



ICO 



The PrufTIan green-earth, by thus differing from the two 

 others, p?.rticularly v.ith regard to the alumina as a con- 

 ttituent part, appears to approach the nature of chlorite. 



Green-earth occurs principally in amygdaloid, alfo as in- 

 crullation on the nodules of zeolite. Sec. Contained in the 

 vacuities ; fometimes as coating the fides cf thefe vacuities, 

 which are often partly filled with the earth. It is alio, 

 though lefs frequently, found in porphyry and balalt, as 

 nodules in the nev>er fandftone, and even in the rocks be- 

 longing to the new flctz-trap-fonnation, fuch as at Aichau 



