ARSENICAL CATTLE DIPS. O 



After the white arsenic has been brought into sokition, a variety 

 of substances, such as tar, soap, oils, etc., may be added with one or 

 more of the following objects in view: (1) To increase the effective- 

 ness of the bath against ticks, either through greater penetrating 

 power or better adhesion, or through repellent action ; (2) to render 

 milder the eifect of the bath upon cattle; (3) to denature the bath so 

 that cattle will not drink it. Proprietary concentrated dips differ 

 from each other and from home-made dips essentially only in the 

 nature and amount of such added substances. 



MAKING THE BOILED DIP. 



The boiled dip has been recommended for use in two strengths, the 

 baths corresponding to which will be termed here " low-strength 

 bath " and " high-strength bath." The low-strength bath is com- 

 monly used for ordinary tick-eradication work on the range, the cattle 

 being dipped regidarly every two weeks for possibly several months. 

 The high-strength bath is used to treat cattle which are undergoing 

 transportation to a tick-free region, the treatment being usually 

 limited to only two dippings, 5 to 10 days apart. 



To make 500 ^ gallons low-strength bath provide : 



Sal soda* 24 poimds. 



White arsenic, 99 per cent pnre. in fine powder 8 pounds. 



Pine tar 1 gallon. 



Put 25 gallons of water in a kettle or tank of 40 to 50 gallons 

 capacity, heat to boiling, and add the sal soda. When this has dis- 

 solved add the white arsenic, then boil and stir for 15 minutes or 

 longer, until the white arsenic has entirely disappeared. If intended 

 for immediate use cool to 140° F. (by the addition of cold water if 

 desired), then pour in the pine tar in a thin stream while constantly 

 and vigorously stirring the solution. Immediately empty the liquid 

 into the dipping vat, which has already been three-fourths filled 

 with water, and stir thoroughly. 



For a stock solution to be kept on hand and used when needed, add 

 no tar, but, after the solution of arsenic and soda has become entirely 

 cold, make it up to 25 gallons (see method on page 7), stir well, 

 let settle, and draw off into containers which can be well closed. 

 This constitutes " low-strength boiled arsenic stock," and its use in a 

 diluted dipping bath calls for a "tar stock," the preparation of 

 which is described on page 7. 



High-strength bath or high-strength boiled arsenic stock is pre- 

 pared in exactly the same way, except that for 500 gallons of diluted 

 bath there is used 10 pounds of white arsenic and 25 pounds of sal 

 soda (or 11 pounds monohydrated sodium carbonate). 



^ The number of pounds of white arsenic needed to make any number of gallons of bath 

 of any strength may be obtained from Table 1, on page 11. 

 *0r monohydrated sodium carbonate, 10 J pounds. 



