VIII 



DEPARTMENT OF AGRICULTURE BULS. 1001-1025. 



Department Bulletin No. 1023.-The Relative Toxicity of Strychnine to ^ ^ 

 the Rat: age . 



Purpose of investigation 



Results of previous investigations. ,, 



Pharmacological action of strychnine 



Experimental procedure 



Results of experimental work: 



Toxicity of strychinne administered subcutaneously » 



Toxicity of strychnine administered orally. *-\j 



Toxicity of diatomaceous earth preparations of strychnine. - 



Toxicity of strychnine administered orally 



Toxicity of diatomaceous earth preparation. 



Effect of age or development upon toxicity of strychnine ^ 



Relative toxicity of'strychnine to ground squirrels, mice, and rats 14 



Strychnine baits yi 



Summary. . \% 



Literature cited 



Department Bulletin No. 1024,-Feeding Experiments with Grade 

 Beef Cows Raising Calves: 



Outline of the experimental work 



Location of the experiment 



The region and its problems ^ 



Objects and plan of the work 3 



Description of cows - 4 



Feeds used 5 



Feed crops in the region - 6 



Kind of pasture - g 



Method of feeding and handling - - - - ------ fi 



I. Rations, gains and losses in weight, and calves produced ° 



Feed consumed .--- .-- g 



Calves produced and their birth weights 9 



Gains and losses in weight : - - n 



Graphic presentation of monthly weights. . . . . . - - - - - - - - - • • 



Feeds consumed per 1,000 pounds of live weight and per calf raised. . 13 



Summary of feeding and handling. . . - - - - - - :- - - 15 



II. Costs of the rations and of raising calves to weaning age i& 



Prices used - - - - - - iq 



Costs of rations and of calves produced - g 



Comparison of results with silage and shock corn ^ 



Summary of costs 



Department Bulletin No. 1025,-Studies in the Clarification of 

 Unfermented Fruit Juices: 



Purpose and scope of the investigation 3 



Methods of clarification generally employed g 



Clarification by means of enzyms ■ .... ■ 5 



Clarification by the formation of a precipitate g 



Clarification by use of inert absorbing agents. ..... - - - --.--- - 



Experiments with diatomaceous earth for clarifying fruit juices ^ 



Purification of the earth _ -•.--. 14 



Difficulties encountered in filtering treated juices. . -------- v 15 



Simple and effective methods of filtration with diatomaceous earth "> 



Pasteurizing before filtering 20 



Filtration of freshly pressed juices ."".'".' * ' 26 



Summary. ........ 28 



Literature cited • 



