588 PROCEEDINGS OF SECTION G^^. 



appeal should be made within three or four days from the date on 

 which the samples were taken. The fanner or his agent should be the 

 person to demand the appeal. He will not appeal if he has adulterated 

 his rnilk, knowing only too well that the cow would then confirm the 

 analyst's opinion. Large milk-selling companies should analyse repre- 

 sentative samples from the milk vats before offering it for sale t« the 

 public, and they should obtain a warranty from their supplying 

 farmers that the milk supplied was pure. The consumers, the milk 

 companies, and the milk producers would then (with an appeal to the 

 cow clause) be protected. 



2— TUMOURS IX^DOMKSTICATED ANIMALS. 



By J. DESMOND. R.V.S., G.M.V.C.. F.E.M.S., Govern nwiit Veterinary .Surgeon. Adelaide. 



Soutli Australia. 



The following is a description of some of the tumours that have 

 been forwarded for laboratory investigation : — • 



Specimens from Chief Inspector of Stock, received 9th October, 

 1901, Laboratory No. S.A. 92. These specimens were hard cystic 

 tumours of the skin, taken from the junction of the throat and neck 

 of some fat cattle that were seized at the city sale-yards. The cattle 

 were in prime condition. They were bred in the North, and for a 

 short time previous to being submitted for sale wei-e pastured in the 

 South-east. 



The tumours were spheroid in shape, about the size of a breakfast 

 cup, sessile, and appeared to grow outwards from the skin. The outer 

 surface was hard and homy, and so tough that a surgical saw had to 

 bei used to bisect the specimen. (See Fig. No. 1.) 



In the centre of these tumours small irregular cavities were 

 found, which were lined with a thin layer of ci'eamy pus. (See Fig. 2, 

 Photo. No. 1.) 



In one case only did a lesion extend deep down under the normal 

 tissue. This was in the largest tumour, where a small cavity contain- 

 ing pus was found in the tissues under the skin. (See Fig. 2, Drawing 

 No. 2.) 



The pus from these tumours was examined with the microscope 

 for Koch's bacillus of tuberculosis, but with negative results. Guinea 

 pigs were inoculated, and when killed 2 months afterwards were 

 found to be free from any disease or ill-effects of the inoculation. 

 Bacteriological cultures were made, and a streptococcus was found. 



These specimens must he classed as cutaneous lionis, and in the 

 description of the following horny growths I shall adhere to the classifi- 

 cation given by Mr. J. Bland Sutton, F.R.C.S., in his work, "Tumours, 

 Iimooent and Malignant." Horas growing from the skin of animals 

 are of four varieties, viz. : 



1. Sebaceous Horiis, tlie subject of our present study, in which a 

 cyst is found at their base. (See Fig. 2. Photo. No. 1.) Sections 

 from the base of these specimens were prepared for microscopic exami- 

 nation, and the following layers were found. (See Fig. 2, Drawing 

 No. 2.) 



2. Wart Horns. (See Figs. 3 and 4.) This specimen is from 

 the cheek, near the angle of the mouth, of sm aged cow, and has been 



