tiaving become convinced of its great diagnostic value, I was able* 

 in the spring of 1892, supported by the state, to begin another 

 experiment. The purpose of this was to obtain practical proof of the 

 possibility, with the aid of tuberculin, of completely freeing a large 

 infected herd from tuberculosis. That is, to rear in the course of a 

 few years, an entirely new and healthy stock from the old one. This 

 was to be done by culling, disinfection, and prevention of spreading 

 through the milk. This fundamental experiment which was executed 

 at the farm, Thurebylille, on the island of Seelaud, is more carefully 

 described below. (See page 22). 



In the Danish parliament the proposition for a new law relative to 

 contagious diseases has been discussed for years. By this it was 

 proposed to establish means for the suppression of tuberculosis.* 



Knowledge of the wide extent of latent tuberculosis obtained by 

 investigation in Denmark and elsewhere rendered it clear that mild 

 methods were out of the question. 1 was at that time of the opinion 

 that the best way for the state to proceed against tuberculosis 

 would be the following. 



The government should furnish cattle owners tuberculin free of 

 cost, under the condition that they use tliis material in a rational 

 manner for the extermination of tuberculosis, the state at the same 

 time should pa}' the veterinarians for the injection and supervision 

 of the temperature observations. The last provision would of course 

 be very expensive to the state, but would be necessary. An extended 

 use of tuberculin was only to be expected when its application could 

 be made free of expense or very nearly so, to the owner, and only in 

 the manner indicated was it considered possible to secure the rational 

 application of tuberculin. 



The minister of the interior readily accepted my ideas and as the 

 result of a discussion in Parliament the Tuberculin Law of 1893,1 

 was issued. This law provides for the expenditure by the minister 

 of the interior of $13,500.u0 (50,-OUO krone) annually for five years 

 for the accomplishment of the above-named object. The law contains 

 the condition that tuberculin must be applied to the investigation of 

 young cattle, that the free tuberculin tests shall be granted only to 



* Compare my article. " Oie Tuberculose unter den Ilausthieren in Diine- 

 mark." Biese Zeitschr. Bd. XVl. S. 428.. 



fAt this time appeared the new law, paragraph eleven of which has regulations 

 ft)r the exclusion Irom commerce of animals apparently tuberculous, ys weU iis 

 for tlie pasturing of such animals together with othei's. This further forbids 

 the uninspected use of meat of such animals and also the use of milk from cows 

 suffering udder tuberculosis. 



