56 



3. The comparative characters of animal and vege- 

 table food in human dietaries. 



The results of the above described very compre- 

 hensive and very laborious experiments on the feeding 

 of animals, involving an elaborate investigation into 

 the composition of the animals fed and slaughtered as 

 human food, in different conditions as to age and fat- 

 ness, have, excepting so far as the composition of the 

 manure in relation to the food consumed is concerned, 

 been published in detail in the various papers enume- 

 rated in the list " Series 2 " in the Appendix. 



Twelve of my Oxford Lectures were devoted to the 

 subject of the feeding of animals, for the production of 

 meat, milk, and manure, and for the exercise of force. 

 In the course of these lectures, the hitherto unpublished 

 results as to the composition of the manure in relation 

 to that of the food consumed, were arranged, studied, 

 and more or less discussed, and thus the basis of a 

 systematic paper on the subject has been provided. 



XV. SUPPLEMENTARY INVESTIGATIONS IN CONNECTION 

 WITH THE SUBJECT OF THE FEEDING OF ANIMALS. 



1. Experiments on the Utilisation of Town Sewage. 



In 1861, 1862 ; and 1863, an extensive investigation 

 was undertaken, in conjunction with the late Professor 

 Way, on behalf of the Royal Sewage Commission, of 

 which Sir J. B. Lawes was a member, on the application 

 of town sewage to different crops, but especially to grass. 

 The amount, and the composition, of both the sewage 

 applied, and the produce grown, were determined ; and, 

 in -selected cases, the composition of the land-drainage 

 waters was also determined. Comparative experiments 

 were also made on the feeding qualities of the differently 

 grown produce ; the amount of increase yielded by oxen, 

 and the amount and the composition of the milk yielded 

 by cows, being determined. A large amount of the 

 analytical work involved was executed at Rothamsted, 

 but most of it by Professor Way, in London. 



