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CHAPTER V. 



Small-pox Inoculation — Its Introduction into Eng- 

 land — Inoculation of Sheep, or Ovination — Ex- 

 periments — Confluent Sheep-pox following Ovi- 

 nation — Preparatory Treatment — Experiment 

 WITH Punctures and Scratches — Local Symptoms 

 — Time to take the Lymph — Inoculated and 

 Eruptive Vesicles — Experiments — Primary 

 Lymph, and Means to improve it — Experiment 

 with Lymph of fourth Remove — Experlment of 

 inoculating and exposing to Contagion simulta- 

 neously — Secondary Eruptions — Protection af- 

 forded BY Ovination — Subsequent Treatment — 

 HuRTREL D'Arboval's Remarks ON Gangrenous 

 Tumours. 



In this section of our Essay we propose to treat of 

 the inoculation of sheep as a means to protect them 

 against future attacks of the small-pox : we shall also 

 describe the phases of the inoculated disease, and 

 record several experiments which were instituted to 

 determine the practicability of having recourse to ovi- 

 nation as a preventive measure. 



The gi'eat mortality produced by the small-pox of 

 man, early attracted attention ; and long prior to sur- 

 gery being practised as a science, inoculation seems to 

 have been adopted for the purpose of diminishing the 

 fatal effects of tlie malady. This plan of communi- 



