lis AGRICULTURAL MUSEUM 



The solution of the iron must be carefully washed off 

 from the copper. 



There is a criterion hy which we may judge certainly 

 if any of the copper be lost. Let all tiie washings, and 

 every thmg, except the copper, be put into a vessel to- 

 gether ; pour in solution of fixed alkali, until no farther 

 jjrecipitation takes place ; let the precipitate subside, and 

 pour off the liquor; apply to the precipitate solution *" 

 volatile alkali, sold by the name of spirit o\' sal ammonia 

 shake them together, and let them stand for an hf 

 if the solution of the alkali acquires a purplish blue Cv. 

 lour, the process is imperfect, if it does not, it is perfect. 



If the process be imperfect, which is always for want 

 of care in the decantations, pour in as much vitriolic acid 

 as win dissolve the. whole precipitate, apply iron to the 

 jjolution, the remaining copper will be procured. 



Extract from Lord Somtrvillz's Essay on Sheep 



Continued from page 103. 



Lest it should be syrrnised, that the facts here' stated, 

 and the conclusions which every judge of sheep will 

 thence be led to draw, should have been formed on a scale, 

 of practice too confined, it is adviseable to suggest, that 

 the flock consists of 340 breeding ewes, and the whole 

 produce at two years old, is fatted olT, with the excepti- 

 on of such draft ewes as may be sold for stores § ; conse- 

 quently the number of the sheep is from 1000 to 1200; a 



§ It bas been dfomei the criterion of a good and profitahJe breed of s'neep, to rijjen early, be- 

 cause there 1.1 room to mulliply such brc ds, far beyond tliose of slower proof. If a sheep can com* 

 to market at two years old, his 1[-ecc ni II he \ong enoush for our ipanufactures, and not sold at aii 

 inferior prire as skin wool ; much before this period. It would he unfit. The growth of any bi^i- 

 proof breed of sheep, is far greater the Drat and S' cood than the third year ; therefore it may be urged 

 tbat more profit can be bad from the ani.^nal at tbisfime, tbau at any later period, its growth auil 

 fleece considered. If attempts had been made to bring into general use a breed of sheep, whose 

 llaeces were of value, but incapable of getting fat, we should be receiving with one baud, what we 

 'v^ere throwing away with the other no general beueiit-couM result; but when we bring sheep 

 bearing such heary fleeces, and that wool capalle «f making broad ctotlrs and ker^cyueres, of 

 ^ality sufBci' Dt to obtain the Rath Society's premiums, and of a proof or aptitude to fatti--a equal 

 to, if Botezceeding any short- woolled sheep we hire, the p riuciple is co UDj;er tu bt: contfoveitr^ i 

 U mult be cocjidered • tr«cd of ejitreme value. 



