THE noo, 473 



To estimate with any rijj^or tho quantity of azotized manure which 

 ou<jlit to result IVoni tho Ibrajjfc! consumed on tlie farm, it were ne- 

 cessary to icnow the proportion of azote contained in the bixlieH of 

 all the animals entertained upon it. Jlavini; the increase of wcM<,'-ht 

 t!»;it occurreil in the stable, cow-house, pijj^-stye, and poultry-yard, wo 

 .•^'t u'd then be in a conditicm to Know tlie precise (jiiantity of dun;j;- 

 w ..oil it would be necessary to retrencii irom that which tin; lorajj^o 

 ou.(iit to have i)roduced, had there been no ])rod»iction ol" animal 

 matter, had the whole ol" the azote of the food passed throu;i^h the; 

 live-stock to the dun<(-hill. Unfortunately, we have no very precise! 

 data by which we mi^ht calculate the quantity of azote contained in 

 a living; animal. 1 shall, nevertheless, endeavor to apply such as 

 we possess. 



From a few practical experiments, and the information at my 

 connnand, I admit that the following substances in their usual state 

 contain per cent. : 



Moisture. Dry matter. Salts. Azote. 



Beef-flesh 77 28 1.0 8.5 



Veal " 



Blood 80 20 0.9 8.0 



Skin 60 40 1.0 7.2 



Hair 9 81 2.0 18.8 



Horn 9 Vl O.T 14.4 



Beef bones (tibia) .80 70 " " 



An entire skeleton 86 64 85.0 6.2 



Brain, intestines, &c 81 10 1.0 2.9 



Fat freed froni skin 20 80 " 19 



These data applied to the various parts which enter into the 

 constitution of the animals which uj) to this point have engaged 

 our attention, we should have for the quantity of azote pc.T cent, 

 contained : 



In horned cattle 8.47 



In tho horse 8.64 



In the hog 8.S0 



In the sheep 8.66 



Average 8.64 



For every 100 lbs. of live weight produced on the farm, conse- 

 (juently, we may, without probably being a great way from the truth, 

 presume that there has been 3.0 of azote fixed, azote obtained from 

 the forage, and which, con-secjuently, cannot go to the dung heap ; in 

 other words, every 100 lbs. of live weight produ(;ed, deprive tho 

 establishment of IHO lbs. of dry standard dung, or nearly 18 cwts. 

 of moist farm-yard dung.* 



\V(! may be allowed, therefore, to entertain the hope that we shall 

 one day b(! able, from the (piantity of forage consumed uf)on a farm, 

 to calculate tlu; actual (juantity of manure which we shall have at 

 our disposal. 'Vo arrive at this result, it would indeed only be ne- 

 ces.sary to subtract the manure rei)rcs(!nted by the azote exhaled 

 from and fixed in tlie bodies of the stock, from the amount of azo- 



* The discussion will undoubtedly extend by and by to phosphoric add. I shall 

 only 8:iy at this time, th:it from the results obtained In tiio case of a pip, the phos- 

 phoric acid appears to bo in tho proporl Ion of from 2 to 3 per cent, of tho live weight 



