84 VETERINARY SURGICAL THERAPEUTICS. 
of chimney where the flames collect and where the cauterieés are 
held to be heated. The heating of the cauteries is done by the — . 
burning of some mineral essence poured into the lamp. The instru- 
ment will do its work from half an hour to two hours without refilling. 
Whatever is the mode of firing, some general rules are to be ob- 
served. If possible, a favorable time should be selected. Spring 
and fall are favorable, and summer objectionable, as during that. 
season the inflammation is often exaggerated and the itching intense, 
the animals scratch, rub, and bite themselves, so that, at times, 
serious accidents are the result. 
Fig, 41—Paquelin de Place’s cautery, 
The preparation of the animal is important. It should have 
fasted, if itis to be cast; if very strong and plethoric, its rations 
should be reduced for several days, and a laxative should be given. 
The region to be fired should be cleaned, all scabs brushed away, if 
there are any ; the hair should be clipped with the machine or cut. 
short with the scissors. For superficial. firing, the hair should be 
left a little long ; so that the instrument may be kept from sliding 
off the point or the line marked off, by a thin carbonized coat of 
burnt hair. For the deep cauterization of synovials, some antisep- » 
tic measures may be useful. The cleaner the skin shall be, the less 
the danger of infection after the operation. When firing is applied. 
