JUDGING THE DAIRY COW IN" SCHOOLS. 3 



asked to fill them in. While discussing the dairy type it is well to 

 have illustrations of good dairy cows constantly before the students. 

 The teacher should make use of good pictures of prize winners as 

 they appear in live-stock journals. If files of these papers are not 

 kept, the good illustrations should be clipped and mounted upon cards 

 for classroom use. A projection lantern with an opaque attachment 

 will be found valuable in this work.^ 



TTiG typical dairy cow. — In order to judge the dairy cow intelli- 

 gently the student should understand that the modern dairy animal 

 is very highly organized, virtually a living machine, the chief func- 



FiG. 3. — An unprofitable dairy cow. 



tion of which is to make a valuable human food out of grains and 

 coarse fodders. Originally cows gave only milk enough to support 

 their calves until they were able to eat sufficient other food for self- 

 .support; Init man, tlirough selective breeding, with care and good 

 feeding, has developed animals which yield a large surplus of milk. 

 All so-called dairy cows do not yield a profitable surplus. As the 

 expense of maintenance is large and variation in milk production is 

 great, many cows are being k('i)t whicli do not give milk enough to 

 pay for their keep. Oru; of the most iiiij)ortant ])hases of dairy 

 management is the elimination of unpi-ofitablo animals (fig. 3). It 



* I-an»f>rn h1I<1ph IlluHtrntlni; typoH and brcr-dH of cattio, inpludlnj,' tin- illiiHtnitlonH of 

 thiH bulletin, may hi- oblulncd from llic Ofllw of AKrlcultunil IiisIiikI inn of tli(! SlaieM 

 U<rlutlonH Hcrvln-. CtiurtH and HtcnrllH for uhc on liIackbonniM imjiv he tij:id<' by tracing 

 I III! outliuf; of a diagram llirown on paper or cloth by a lauturn. 



