12 



N. H. AGRICULTURAL EXPERIMENT STATION [Bulletin 199 



the New Hampshire Station is more than doing its share. In 

 co-operation with the Carnegie Institution's Nutrition Laboratory 

 there has been estabhshed at Durham the first respiration cham- 

 ber of a simple inexpensive type for use with large domestic ani- 

 mals. By means of this chamber it is possible to determine with 

 scientific accuracy and in a short time the influence upon cattle of 

 a certain type of feeding, housing condition or other factors that 

 affect animal growth. This work supplements and multiplies 



The respiration chamber which gives the key to balanced rations. 



the value of extensive investigations that have been conducted 

 for many years at the Pennsj'-lvania State College. As a result 

 of it a number of feeding problems which directly concern New 

 Hampshire are being solved. It has opened up a new field for the 

 other state experiment stations of the country by demonstrating 

 the possibilities of a respiration chamber, the cost of which is 

 $1200, whereas the only others in existence cost tens of thousands. 

 For the first time by means of this chamber figures have been 

 secured on the digestive value of native mixed hay; and when 

 further analyses have been made, a more accurately balanced 

 ration can be fed in the state than has hitherto been possible. 



