No 6. DEPARTMENT OF AGRICULTURE. 495 



violent, jumping in the, air and rolling on the ground, as well as claw- 

 ing at his throat. Everyone that saw him, declared that he was 

 going mad. Mrs. Be-ck was the only one that was at home at the 

 time. Against the protest of the crowd that had (juickly gathered, she 

 firmly held his head between her knees pulling his mouth open, look- 

 ing down, saw a large bone wedged in his throat. She took a stick 

 and pried it out which of course, ended the truuble. Now the point 

 that I wish to make is this: With the excitement that it made, 

 within a few minutes some one would have turned in a mad dog 

 scare. The police would have arrived on the scene, the dog would 

 have been shot, and the reports gone around that a dog had been 

 killed with hydrophobia. 



Slany people take no precaution as to what they feed their dogs, 

 imagining that they can swallow anything, when in reality such food 

 as sharp chicken bones are extremely dangerous. If you have any 

 doubt as to whether sharp chicken bones will produce symptoms of 

 hydrophobia, just try eating some. You are about at able to swallow 

 them as the dog. 



I am giving you these practical examples for the purpose of show- 

 ing, that there may be other conditions effecting the dog 'producing 

 symptoms, in most every case, similar to those of hydrophobia. 



Another thing I wish to mention. In case a dog bites you do not 

 leave them kill the dog at once. Tie him up so you can see if he 

 will develop hydrophobia. By at once killing the dog, you destroy 

 your best means of diagnosis. 



NITROGEN: ITS FORMS AND SOURCES 



By DR. C. W. STODDART, State College. Pa. 



"Nitrogen is, after water, the greatest factor in the creation, growth 

 and working of nature ; to bind it and be its master, that is the prob- 

 lem; to make use of it, therein lies real agriculture; to bring its 

 sources which are inexhaustible into service, that it is which creates 

 wealth." 



Ever since Schultz-Lupitz. the pupil of the great Baron Von Liebig, 

 made that statement some fifty years ago, "the nitrogen problem" has 

 disturbed statisticians and even scientists from time to time; for 

 nitrogen is a most necessary and useful element in human life and 

 progress. It is useful in the manufacture of many synthetic medi- 

 cines and poisons, very powerful medicines and poisons they are, too; 

 beautiful dyes ; gun-powder ; celluloid ; nitro-glycerine; collodion ; gun- 

 cotton. It is a necessary constitutent of human foods, for it is an in- 

 tegral part of every living cell, and of most bodily tissue such as 

 muscle, skin, hair and bones. 



But what is the source of this nitrogen that is so important? 



