268 A TICK-RESISTANT CONDITION IN CATTLK. 



tick resistant this season and tliis Mr. Noble claimed to be- 

 due to contact with the Jersey. 



Mrs. Bedington, Eumnndi, wrote (January 31st, 1918)^ 

 that she had bought two heifers from Mr. Hull, both of 

 which carried ticks but did not become badly iiifested. 

 They were dipped regularly. 



Mr. R. W. Mealing, Butterfat, North Arm, wrote that 

 of the three heifers purchased, only one had l)een retained. 

 She was ticky and was dipped regularly. As this animal 

 was ticky when sold and was from ticky stock this fact is 

 not surprising. 



¥oT Messrs. B. H. Corser & H. Walker's experience- 

 see the account given for the cows Clover and Tinkerbell. 



Information collected from other sources. 

 In view of the fact that one or more tick-resistant 

 animals occur in very many herds and the utter ini])ossibility 

 of examining more than a small fraction of the total number, 

 those who were interested in the subject were iu^'ited 

 through the Agricultural Journals of Queensland and New 

 South Wales (Johnston and Bancroft, lOlHa, b) as well 

 as through the local press, to send any observations they 

 had made which might help in the investigation. Authentic- 

 observations under the following headings as regards tick- 

 resistant animals were especially asked for. 



1. Were such animals more usually of any particular 

 breed ? 



2. The length and texture of the hair. 



3. The colour, texture and oiliness of the skin. 



4. The general condition and stamina of the beasts, 



5. The length of time the animals had l)een resistant, 

 whether they had possessed the resistance from birth, or 

 had acquired the jDeculiarity later in life ? 



0. The transmission of this resistance to their progeny. 



7. The nature of the countiy on which the animals 

 were grazing. 



8. Influence (if any) of food. 



9. The effect (if any) of dipping such resistant animals. 



10. Whether an exudate (whicli was describe<l and 

 differentiated from a tick sore) had e^'er been noticed on 

 these cattle. 



