CONTENTS. 

 Part 1 (March, 1915). 



PAGE 



Russell, E. J. and Appleyard, A. The Atmosphere of the Soil : 

 its Composition and the Causes of Variation. (Seventeen figures 

 in text) 1 



CUNNIXGHAM, A. Studies on Soil Protozoa ..... 49 



Hutchinson, H. B., and MacLennan, K. Studies on the Lime 

 Requirements of Certain Soils. (With Plate I and four figures in 

 text) 75 



Martin, C. H., and Lewin, K. E-. Notes on Some Methods for the 



Examination of Soil Protozoa. (With Plates II and III). . 106 



Eyre, J. V., and Fisher, E. A. Some Considerations affecting the 

 Growing of Linseed as a Farm Crop in England. I. Variations 

 in the Oil Content. (Two figures in text) .... 120 



Part 2 (September, 1915). 



Leather, J. Walter. The Effect of Climate on Soil Formation . 135 

 Crowther, Charles. Probable Error in Pig-Feeding Trials 137 



Robinson, G. W. Note on the EfTect of Changes in the Viscosity of 



Water on the Results of Mechanical Analyses conducted at Varying 



Temperatures ......... 142 



Robinson, G. W., and Lloyd, W. E. On the Probable Error of 



Sampling in Soil Surveys. (Two figures in text) . . . 144 



Murray, .1. Alan. The Starch Equivalent Theory. (One diagram 



in text) 154 



Halnan, E. T. The Maintenance Ration of Oxen and the Starch 



Equivalent Theory 1()3 



Wormald, H. Variation in the Male Hop, Humulus lupulus L. 



(With Plate IV) 175 



Crowther. Charles, and Ruston, Arthur G. The Influence on 



Crop and Soil of Manures applied to Permanent Meadow. (Three 



figures in text) ......... 197 



Cooper, W. F., and Nuttall, W. H. The Theory of Wetting, and 



the Determination of the Wetting Power of Dipping and Spraying 



Fluids containing a Soap Basis. (Three figures in text). . 219 



Leather, .J. Walter. Soil Gases ...... 240 



Appleyard, A., and Russell, E. J. Soil Gases: Reply to Dr Leather 242 

 Mackenzie, K. J. .J., and Marshall, F. H. A. On Ovariotomy in 



Sows ; with Observations on the Mammary Glands and the Internal 



Genital Organs ......... 243 



Weir, William. The Effect of removing the Soluble Humus from 



a Soil on its Productiveness ....... 24(i 



