SECTIONAL TRANSACTIONS.—M. 457 
SECTION M.—AGRICULTURE. 
(For references to the publication elsewhere of communications entered in 
the following list of transactions, see p. 467.) 
Wednesday, September 7. 
Special Lecture to Farmers,—Science and Crop Production, by 
Dr. E. J. Russet, F.R.S. 
Thursday, September 8. 
1, Dr. Winirrep E. BrencutEy.—Lffect of Lona-continued Manur- 
ing on Grassland. 
. Dr. W. G. Smrru.—Methods of Grassland Analysis; Results for 
the Period 1914-1920. 
. Dr. W. G. Smrru and Dr. A. Lauper.—A Survey (Botanical and 
Chemical) of Hill Farms in the Lothians. 
Ps 
i) 
4. Mr. M. M. Monte.—Account of Soil Survey Work in West of 
Scolland. 
5 
. Prof. J. Henprick.—The Absorption and Retention of Manurial 
Substances by Granite Soil. 
6. Mr. H. J. Pack and Mr. H. G. Toornton.—On the Rapid Fluctua- 
tions in Bacterial Numbers and Nitrate Content of Field Soil 
and their inter-relation. 
In the afternoon demonstrations were given as follows: 
(a) Dr. F. A. E. Crew.—Demonstration on the Wools of Primitive 
Breeds of Sheep (at the Station for Research in Animal Breeding, 
High School Yards). 
(b) Dr. R. Stewart MacDoucatu.—Exhibition of Insects Injurious 
to Stock (at the Entomology Laboratovy). 
(c) Exhibition of Early Works dealing with Agriculture and 
Kindred Subjects (at the Agricultural Department). 
Friday, September 9. 
7. Dr. J. F. Tocuer.—(a) Citric Solubility of Mineral Phosphates ; 
(b) Method of Determining the Significant Differences of Yield 
of Milk; (c) Statistical Analyses of Scottish Milk Records. 
8. Prof. J. Henprick.—A New Scheme for the Determination of 
Unerhausted Manurial Values. 
9. Prof. R. A. Berry.—Production and Utilisation of Whey. 
10. Prof. R. H. Lerrcu.—Research Work in Dairying. 
11, Dr. Wa. Taytor and Mr. A. D. Huspanp.—Note on the Effect of 
Varying Rates of Secretion of Milk on its Percentage 
Composition. 
12, Mr. J. Avan Murray.—Fnsilage. 
Ensilage is a means of conserving forage for winter keep. The only alterna- 
tive is to dry the forage, i.e. to make it into hay. The former is the more 
expensive method, and causes greater deterioration. The greater expense of 
ensilage is attributable mainly to the annual charges for capital expenditure on 
silos and machinery for filling them. The expenses of conservation by ensilage 
1921 I 
