CONTENTS. 9 



Department Bulletin No. 1097. — The Effect of Silage on the 

 Flavor and Odor of Milk: p 



Causes of taints in milk 2 



Description of methods used in expeiimental work '.'."..'. 2 



The feeding of silage _' 5 



Experiments with corn silage 5 



Effect of condensing on silage-flavored milk I3 



Feeding spoiled silage _. i3 



Discussion of corn-sUage experiments X4 



Experiments with alfalfa silage I5 



Experiments with sweet-clover silage I7 



Experiments with soy-bean silage 19 



Discussion of legume-silage experiments 21 



Part played by aeration in reducing silage flavors and odors 21 



Good flavors and odors in milk 22 



Conclusions 23 



Literature cited 23 



Department Bulletin No. 1098. — Impounding Water in a Bayou to 

 Control Breeding op Malaria Mosquitoes; 



Introduction j 



Topography and formation of the region 2 



Favorable conditions for mosquito development 3 



Location of cultivated lands, roadways, and dwellings 3 



Problem of Anopheles control in the region 4 



Bayou Walnut and the Anopheles survey 4 



Fishes of the region 10 



Clearing the bayou 11 



Construction of the dam 12 



Maintenance work following clearing and construction 14 



Survey of Anopheles breeding after impounding : 14 



Fishes in the impounded area 16 



Factors preventing mosquito breeding in the impounded water 17 



Leakages caused by crawfish and means of preventing them 18 



Advantages of impounding, apart from prevention of Anopheles breeding. 19 



Summary 20 



Department Bulletin No. 1099. — Frost Injury to Tomatoes: 



Introduction 1 



Varieties studied and results 2 



Undercooling 4 



Effect of cold on the tomato plant 5 



Studies in the field 6 



Summary 8 



Literature cited 10 



Department Bulletin No. 1100. — A Method of Determining Grease and 

 Dirt in Wool: 



Object of this investigation. 1 



Method of obtaining data 1 



Experimental work '. . 2 



Index figures for grease and dirt 2 



Basis of the index figures 5 



Conditioning for weighing 6 



Determining weight of grease IJ 



Determining weight of dirt 15 



Weekly working schedule 15 



Explanation of wool-scouring data sheet 19 



Summary 20 



64042—23 2 



