CONTENTS. V 



Department Bulletin No. 1010. — The Preparation of an Edible Oil 



from Crude Corn Oil: Page. 



Scope of the investigations 1 



Small-quantity experiments on methods of refining corn oil 2 



Comparative refining qualities of corn oil from dry and wet process germs. . 14 

 Refining 10-pound batches of corn oil to determine the cost of the chemicals 



used and the value of the oil lost 16 



Estimated total cost of refining corn oil : 18 



Chemicals and loss of oil 18 



Fuel 20 



Labor 20 



Overhead 20 



Description of the equipment and the method of handling corn oil in the 



refinery 21 



Summary 25 



Department Bulletin No. 1011.- — Effects of Mutilating the Seeds on 

 the Growth and Productiveness of Corn: 



Previous investigations of the effects of the removal of food reserves from 



seeds 1 



Experiments on the effects of mutilation of the seed coats and endosperms. 3 



Preparation of the seeds 4 



Plan of the experiments 4 



Experimental data on the effects of the mutilation of the seed coats and 



endosperms 5 



Experiments on the effects of the mutilation of the germs 8 



Germination of the mutilated germs 9 



Growth and seed production of the mutilated germs 10 



Summary 12 



Literature cited 14 



Department Bulletin No. 1012. — The Death Camas, Zygadenus Panicu- 

 latus and z. elegans, as poisonous plants: 



Purpose and scope of paper 1 



Zygadenus paniculatus 2 



Description and distribution of plant 2 



Experimental feeding 3 



Discussion and results 10 



Symptoms 10 



Duration of symptoms , 12 



Time required to produce symptoms 13 



Toxic and lethal dosage 13 



Zygadenus elegans 16 



Description and distribution of plant 16 



Experimental feeding 17 



Discussion and results 20 



Symptoms 20 



Duration of symptoms 21 



Time required to produce symptoms 21 



Results of autopsy 22 



Toxic arfd lethal dosage 22 



Comparative toxicity of Z. gramineus, Z. paniculatus, and Z. 



elegans 24 



Z. elegans not especially dangerous for sheep 25 



Summary 25 



Department Bulletin No. 1013. — The Influence of Relative Humidity 

 and Moisture Content of Wheat on Milling Yields and Moisture 

 Content of Flour: 



Introduction 1 



Humidity 2 



Normal moisture content 2 



Material and method of experiments 3 



Influence of relative humidity on total yield of mill products and invisible 



loss 5 



Comparison of the influence of relative humidity and of moisture content 



of wheat on milling yields 6 



