Report on the Parasitic Lnnrj Disease of Lambs. 267 



of the lambs is also the very opposite to that which we advocate 

 as giving the greatest amount of security. Thus, during the 

 summer the ewes are fed on permanent pasture and new seeds, 

 and after harvest on the stubbles, clover, and other eddishes, up 

 to the time of breaking these up for wheat, when they go to 

 turnips, following the hoggets. In many instances the tups are 

 put to the ewes while they are being fed on the ncAV seeds. 

 Lambing often commences when the ewes are on turnips ; but if 

 so, both ewes and lambs ai'e soon removed to the neio seeds and 

 pastures, cake and corn being given according to circumstances. 

 Here they remain until weaning-time, when the lambs are 

 turned on the pastures until they become settled, after which 

 they are removed to the clover eddishes, or to the clovers grazed 

 previously with the ewes and lambs, or occasionally, in some 

 instances, to white clover grazed two years in succession. 



Thus we see that the young animals are, during the most 

 dangerous period of their lives, kept on land and on food the 

 most likely to infect them with parasites, which had, either in 

 the form of ova or embryotic worms, been coughed up by 

 infected sheep, and undergone a further development, out of the 

 body of the animals, to fit them in due time for also dwelling 

 Avithin the respiratory organs, the habitat in which they become 

 .sexually mature and give rise by their enormous multiplication 

 to organic diseases of the lungs and often to death. It also 

 appears that lambs which are diseased to a serious extent, are 

 frequently changed froin pasture to pasture, both natural and 

 artificial, thus distributing broadcast myriads of ova and immature 

 worms over the whole farm, to become in due course the cause 

 of disease in lambs yet unborn. 



The true explanation of the serious losses which are sustained 

 in Lincolnshire is, we believe, to be found in the facts relating 

 to sheep husbandry as carried out in that county, and to which 

 attention is called in this report. 



List of Queries prepared l^y Professor SlMO]SrDS. 



1. How long lias the farm been in present occupation ? 



2. What is the genei-al character of the soil and subsoil ? 



3. What are the relative proportions of meadow and arable land? 



4. Is the farm wet or dry ; partially or wholly drained? 



5. State the system of husbandry with regard to the rotation of crops. 



6. Is the meadow land liable to flood? 



7. Are the meadows mown and fed in alternate years, or mown yearly and 

 the after grass fed with slicep ? 



8. Do sheep contract rot on the farm ? 



9. For how many years have you been familiar with the " lung-worm 

 disease " on your farm ? 



