872 EXPERIMENT STATION RECORD. r Vol. 40 



pheasants (Phasionns colchieus) that showed a mixture of the characters of 

 the two sexes, and also notes on a hen of the same species that developed 

 masculine traits. 



The experimental results wore supplemented by histological observations on 

 the gonads. Interstitial tissue was found in young male pheasants and chick- 

 ens. In the latter it disapi>eared at puberty. In adult phesants the tissue 

 was present durin? periods of sexual inactivity only. 



The paper contains numerous references to experimental studies of the 

 secondary sexual characters in ether animals. 



The growth of the body in man: The relationship between the body- weight 

 and the body-length (stem-length), E. W. A. Wat.ker {Pror. Bny. Nor. 

 [London], Ber. B. 89 (1916), No. B (112. pp. /.77-/7S).— The purpose of this in 

 vestlgatfOn was to determine to what extent the body length Is proportional 

 to the cube root of the body weight. The subjects used were human beings, 

 but the body dimension selected for measurement was the joint length of head, 

 neck, and trunk, so as to facilitate comparison with the results of measuring 

 the bead to pin-bone lengtfc of other mammals. In making the observations the 

 inaccuracies of the ordinary sittinc height measurement were avoided by caus- 

 ing the subject to sit on the floor with his hack- against the wall and his h 

 flexed. He thus rests upon the ischial tuberosities and not on the contracted 

 muscles of the thigh. The Bubjects were English, of both and ranged 



from infants to university andergradual 



The data were treated by plotting the logarithm Of length (J) against the 

 logarithm of weight IW), assuming that the two variables are connected by 

 the formula log / = log k+n log W. I'lic arbitrary constants k ami u were then 

 determined by the position and slope of the ••best" fitting straight line (as 

 determi I by Inspection) passing through the plotted points. 



The value of /.- Is of no general Interest since it varies with the units of 

 measurement, but. whatever the units, if then- is direct proportionality be- 

 tween the length and the cube root of the weight, n should be equal to i,. 

 In the data at hand the Pest value of n for males was found to be 0.329 and for 

 females 0.823. These are considered very close approaches to the expt 

 value. 



Cattle calipers. A. < '. MoOaITOUSH \.U,ur. Dairy Sot, 2 (1919), No, /.;,,». SH- 

 31. fins. 2). — Diagram and specifications are L-iven for sliding arm calipers 

 suitable for measuring the body dimensions of cattle. The novel feature is a 

 spiral Spring which aids in the release of the clamp on the movahle arm. They 



were devised at the Iowa Experiment station. 



Report of progress on animal husbandry investigation in 1917. J. YV. 

 Gowkn (Maine stn. Bui j; | (1911), pp. S05-4W8, pis. 2. fig. 1).— This continues 

 the annual reports I B. S. K.. 38, p. 175) OS the cattle investigation projects of 

 the station. The following topftes are treated: 



InaJyses Of »'i'/A- record*. — The numerical factors required to correct for in- 

 fluence of age on milk and fat yield in the Guernsey breed have been computed 

 from Advanced Registry Records thus completing these determinations for 

 the major dairy breeds. The BgUfeS are not published. One of their uses is 

 Illustrated In a comparison of the herd-improving abilities of 37 Guernsey sires 

 each with at least 7 advanced registry daughters from advanced registry 

 dams. 



Variation* and mode of secreHo**o/ mUk s"i ids. —This is an abstract of a 

 paper previously noted ( E. S. It.. 40, p. 072 > . 



Cattlr fudging a* a mmns of srlcrtino ©0*01 fnr the hrrd.—\ croup of 072 

 Jersey cows whose score card totals as determined" by competent faA ■ 



