524 IOWA DEPARTMENT OF AGRICULTURE. 



days after the first one. All of the sheep in a certain flock or shipment 

 in which the disease is present shall be considered as affected with the 

 disease. 



"4. Sheep that are not affected with the disease, but which have been 

 exposed to the contagion, may be shipped for feeding or stocking pur- 

 poses after one dipping, but may be shipped for immediate slaughter 

 without dipping. 



"5. When affected sheep are shipped for slaughter after one dipping, 

 and when exposed sheep are shipped for slaughter without dipping, the 

 cars conveying them shall be marked on each side with a card bearing 

 the words 'Scabby Sheep," and said cards shall not be removed until the 

 cars have been cleaned and disinfected. 

 "6. The dips now approved are: 



"(a) The tobacco-and-sulphur dip, made with sufBcient 

 extract of tobacco or nicotine solution to give a mixture con- 

 taining not less than five one-hundredths of 1 per cent of 

 nicotine and 2 per cent of flowers of sulphur. 



"(b) The lime-and-sulphur dip, made with 8 pounds of 

 unslaked lime and 24 pounds of flowers of sulphur to 100 

 gallons of water. The lime and sulphur should be boiled 

 together for not less than two hours, and all sediment al- 

 lowed to subside before the liquid is placed in the dipping 

 vat. 

 "Either one of these dips may be used. 



"7. The dipping must be done carefully and the sheep handled as 

 humanely as possible. The department, however, assumes no responsi- 

 bility for loss or damage resulting from the dipping, and those who 

 wish to avoid any risks that may be incident to dipping at the stock- 

 yards, as well as to avoid liability to prosecution, should see that their 

 sheep are free from disease before shipping them to market. 



"8. The sheep must be kept in the dip between two and three min- 

 utes and their heads be submerged at least once, though for but an in- 

 stant at a time, and assistance must be rendered immediately if they 

 appear to be strangling. The dip must be maintained at a temperature 

 between 100° F. and 105° F. while the sheep are in it. It must be 

 changed as soon as it becomes fllthy, regardless of the number of sheep 

 dipped in it, and in no case shall it be used wlien more than one week 

 old. In emptying the dipping vat the entire contents must be removed, 

 including all sediment and droppings or other foreign matter. 



"9. Suitable dripping platforms and drying pens shall be provided. 

 In cold weather sheep shall not be dipped unless they can be kept in a 

 warm pen until dry. Sheep shall not be loaded until they have become 

 dry. 



"10. Where large numbers of sheep in a district are ready for trans- 

 portation, inspectors of the Bureau of Animal Industry will make in- 

 spections and give certiflcates for sheep found free from disease and 

 not to have been exposed to the contagion and for sheep dipped under 

 their supervision. Certificates will also be given at feeding stations and 

 stock yards where inspectors may be stationed. 



