240 A TICK-BESISTANT CONDITION IN CATTLE. 



the appointment of a small committee (consisting of Messrs. 

 Tryon, Pound, Cory, Johnston, Steele and a nominee of 

 Mr. Hull) to supcTvise and direct further investigations- 

 ■and experiments (R.S.C., 1915, p. iii). 



In giving evidence, IVIr. Hull restated his main claims, 

 adding that he believed that the application of an arsenical 

 clip or wash temporarily banished the condition of tick 

 resistance (R.8.C., p. 8). One of us mentioned the more 

 important claims in liis evidence (R.S.C., p. 56-8). 



The new committee, under the chairmanship of JVIr. 

 H. Tryon, and consisting of those above named (except Dr. 

 Steele) formulated a scheme of work, but owing to circum- 

 stances which need not be referred to here, found itself 

 unable to proceed. Its report was laid on the table of the 

 House, 22nd December, 1916, but was not printed as a 

 Parliamentary paper (Tryon, 1917, p. 53). 



The senior author has been interested in Mr. Hull's 

 claims for several years but has been able to give only 

 intermittent attention to them owing to pressure of other 

 duties. He has, however, been constantly in touch with 

 Mr. Hull, and has paid frequent visits of inspection (1915- 

 1917) to his farm at " Cudgeree," at Eumundi. The junior 

 author was able to stay there for a prolonged period during 

 the past tick season, January-February, 1918, and has 

 made subsequent visits. Mr. Hull has afforded every 

 possible assistance and has placed at our disposal all his 

 records relating to the matter under discussion. The state- 

 ments contained therein have been compared as far as could 

 be done, with those contained in letters received from him 

 since early in 1915, and with the observations made by 

 both of us during our many visits. 



The work outlined by one of us (Johnston, in R.S.C., 

 p. 58-9) might be summarised thus : 



(1) To ascertain whether the tick resisting condition 



actually existed, i.e., whether his so-called re- 

 sistant cattle when placed under conditions of 

 natural infestation, would become tick infested 

 and mature ticks to such a degree as to require 

 dipping or other treatment to prevent tick worry. 



(2) If tick resistance be present can it be transmitted ? 



