168 EXPEEIMENT STATION RECORD. [Vol.36 



the close of the second year's feeding there was a difference of 53 lbs. in the 

 average weight of the heifers maintained in range condition as compared with 

 those that had been wintered under more nearly ideal conditions. The average 

 cost of this additional growth was $6.97 per head. 



The results of a feeding experiment with pigs during the winter of 1914-15 

 indicate that corn is slightly superior to any of the grain sorghums, its use re- 

 sulting in more rapid gains and a higher finish. There was very little differ- 

 ence between the value of Kafir corn, feterita, and milo maize. Kaoliang did 

 not prove to be very palatable. The feeding of whole threshed Kafir corn re- 

 sulted in a great waste of feed, while the feeding of Kafir corn in the head 

 proved to be advisable where facilities for grinding it are not present on the 

 farm. 



Inheritance of color and horns in blue-gray cattle, O. Lloyd-Jones and 

 J. EvvARD (loiva Sta. Research Bui. 30 {1916), pp. 67a^l06a, figs. iO).— Data 

 that have accumulated for 13 years at the Iowa Station on color and horn 

 inheritance in crosses between Galloway and Shorthorn cattle are presented. 

 Preliminary reports of progress have been reported by E. N. Wentworth 

 (E. S. R., 28, p. 572). 



A detailed discussion is offered of the color and polled or horned condition as 

 seen in the parent breeds and the offspring resulting from the crosses in these 

 experiments, together with suggestions as to the genetic relationship as to these 

 characters. 



Since 1906 when the inheritance studies reported were undertaken 24 dams as 

 follows have been used: Four Shorthorns, 5 Fi blue-gray (from white Short- 

 horn bull X Galloway cows), 3 Galloways, and 12 others of various generations 

 and descriptions. The sires in use have been a blue-gray polled Fi (from white 

 Shorthorn bull X Galloway cow), a red polled F2, and red, roan, and white 

 Shorthorn bulls. In all, 71 calves have been produced which are included in the 

 present work. 



The authors conclude that " the nature of black and red pigment in cattle as 

 an independent allelomorphic pair of characters is clearly indicated. White ani- 

 mals appear to be the result of pigment in a restricted condition, due to the 

 absence of the factor E for extension. The restricted pigment may be either 

 black or red in color. No extracted animal white with red ears has yet ap- 

 peared. The whites with black ears, a novelty in this experiment, are similar 

 in pattern to the Park Cattle of Britain, but it is doubtful if they can be con- 

 sidered genetically comparable to them. 



"A satisfactory explanation of the genetics of roan color in cattle has not 

 yet been made. A roan-producing factor N has been tentatively assumed to exist, 

 but the results secured from these experimental matings agree almost equally 

 well with the interpretation of roan as a heterozygote between white and col- 

 ored. This would make the factor N unnecessary, for the roan condition would 

 appear in all animals that were heterozygous for extension, that is Ee, without 

 the aid of any other factor. 



" The published data on the inheritance of horns in cattle are reviewed and 

 new data presented. The present results substantiate the allelomorphic nature 

 of the horned and polled condition in cattle, and give no evidence that sex is in 

 any way connected with the inheritance of these characters." 



A bibliography is included. 



Feeding range steers, L. Foster and H. H. Simpson (New Mexico Sta. Bui. 

 101 {1916), pp. 24, figs. iO).— This bulletin gives the results of feeding experi- 

 ments conducted in 1909 and 1910 with range steers. 



In the first experiment, which lasted 91 days from January 8, 1909, a com- 

 parison was made of the feeding values of barley, corn, and Kafir corn, each 



