VOL. XLVni.] PHILOSOPHICAL TRANSACTIONS. 535 



such operations any more : so that she was discharged out of the Infirmary, with 

 such little relief as above mentioned, and Dr. H. never has heard more of her. 

 He wished she had tried it a while longer, as it bid so fair to do her service ; and 

 this was the only case, which gave any reasonable hopes from its use. 



Another young girl, about l6, whose right arm was paralytic, on being elec- 

 trized the 2d time, became universally paralytic, and remained so about a fort- 

 night ; when the increased palsy was removed indeed by the medicines which 

 her case indicated ; but the first diseased arm remained as before. However, 

 notwithstanding the former bad accident, he had a mind to try the electricity on 

 her again, which he renewed, and after about 3 or 4 days use, she became the 

 2d time universally paralytic, and even lost her voice and tongue, and with dif- 

 ficulty could swallow : this confirmed him in opinion, that the electric shocks 

 had occasioned these symptoms. He therefore omitted it, and the girl, though 

 she got better of her additional palsy, remained as bad as before of her first ; and 

 after about 4 months repeated course of medicines of different kinds on her, she 

 was discharged incurable. 



These were the only 2 cases worth noticing, that had occurred, in which it 

 could be said to have produced any remarkable eflTects at all : for on numbers of 

 others, that had experienced it, Dr. H. observed nothing happen, except that 

 when the affected palsied limb was touched with the electrical conductor, a con- 

 vulsive motion was produced immediately ; but this was over very soon, and they 

 had all remained as motionless and bad as before. 



XCV. On the Number of Inhabitants within the London Bills of Mortality. 

 By the Rev. IVm. Brakenridge, D. D., F. R. S. p. 788. 

 Dr. B. consulted the yearly bills of mortality for the last 50 years, viz. from 

 1704 to 1753, which he imagines sufficient for the purpose; and from them he 

 extracted all the numbers of the baptisms and burials, both within the walls of 

 London, and at large within the bills of mortality. And because it may be surer 

 to compute from a number of years taken at an average, than from the numbers 

 in any one year as they stand in the bills; he took the sums of the numbers, for 

 each 3 years of the 50, and then the 5 th part of each of these sums : which will 

 at a medium be the number for any particular year. And in like manner, he 

 took the sums of the numbers for each 10 years, and the 10th part of each of 

 the sums will be the number for any year, at an average. And the numbers so 

 found appeared thus : 



