96 Report of the Butlin 



of ignited potash and charcoal^ out of the contact of air, 

 A the tube for water. B the iron tube. C the receiver 

 for the ammonia. D the pneumatic apparatus. 



Fig. 5. The apparatus for the decomposition of am- 

 monia. 



Fig. 6. A Voltaic apparatus, being one of the 200 which 

 compose the new Voltaic battery ot the Royal Institution* 

 For the construction of this battery, and of other instru- 

 ments applicable to new researches, a fund of upwards of 

 ^lOOO has been raised by subscription, from members of 

 the Royal Institution. As yet, the whole combination has 

 not been put into action ; but reasoning from the effects 

 of that part of it which has been used, some important 

 phsenomena may be expected from so great an accumula- 

 tion of electrical power. 



XVI. Report of the Dublin Cow- Pock Institution, under 

 the Patronage of His Grace the Lord Lieutenant, for 

 1809. 



An Abstract from the Register of Inoculations and Distri- 

 bution of Matter. 



The directors of the institution have great pleasure in 

 observing the progressive increase of vaccine inoculation, 

 and the influence of experience in satisfying the public of 

 its efficacy. Most of the above 12,065 patients being con- 

 fined to a city where small -pox has been in general preva- 

 lent, must have been exposed in every possible way to its 

 infection, by living in the same house, or frequently sleep- 

 ing in the same bed with the infected. The anxiety of 

 parents, too, has often led them intentionally to expose their 



children 



