VOL. LXXII.] 



PHILOSOPHICAL TRANSACTIONS. 



183 



emission from the volcanos, and by that means spinning out the pure vitrified 

 matter from its pores or cells, the wind at the same time carrying off those fila- 

 ments of glass as fast as they were produced." 



That some of the fine filaments found after the eruptions of the volcanos 

 were formed in this manner is not unlikely : but as we see about the iron fur- 

 naces the vitrified scoria drawn into fine threads, of very considerable length, by 

 the simple action of the wind from the bellows, is it not very probable, that the 

 far greater part at least of those filaments scattered over the land, and which 

 were found 2 or 3 feet long, were drawn out before the ejection of the lava from 

 the crater by the force of those violent torrents of wind which must be required 

 to support and actuate so intense a fire as at those times fills the body of the 

 mountain ? The extreme fineness to which these filaments are reduced, and 

 their brittleness, render it almost impossible to convey them to any distance, 

 preserving at the same time any considerable length of the fibres ; these now 

 sent resemble cotton in appearance, but if examined with a microscope will be 

 found in all respects similar to those described by Sir W. Hamilton. 



VII. An Extract of the Register of the Parish of Holy Cross, Salop, being a 

 Third Decade of Years from Michaelmas 1770 to Michaelmas 1780, carefully 

 digested in the following Table. By the Rev. Mr. William Gorsuch, Vicar 

 p. 53. 



_ .. , f Males 

 Baptized | Females 



„ . , S Males 

 Buned i Females 



Under a month 

 From mo. to 1 yr. 



1 to 2 .. 



2 .. 5 .. 



Died in the 10 years. 

 Male. Fem. Total. 



5 

 10 

 15 

 20 

 25 

 30 

 35 



10 .. 



15 .. 

 20 



25 ... 



30 ... 



35 ... 



40 ... 



11 



15 

 11 

 17 



7 

 1 



1 

 4 

 8 

 3 

 8 



11 



23 



11 



15 



7 



2 



2 



2 



4 



4 



3 



22 



38 



22 



32 



14 



3 



3 



6 



12 



7 



11 



Increase 



40 to 45 

 45 . . 50 . . . 



74 



Died in the 10 yean. 

 Male. Pem. Total. 



50 



55 



60 

 65 

 70 

 75 

 80 

 85 

 90 



55 .. 

 60 ... 



65 .., 

 70 ... 

 75 ... 

 80 ... 

 85 ... 

 90 ... 



95 ... 



7 



3 



11 



5 



13 

 3 



11 15 

 9 7 



12 7 

 1 1 



4 



11 



8 



19 

 9 



22 



6 



26 



16 



19 



2 



4 



An actual survey was made in 1775, when the number of the inhabitants was 

 found to be 105" : of which there were under ten 287, and above seventy 57, 

 viz. from 70 to 75, males 12 females 10 = 22. From 75 to 80, males 8 fe- 

 males 11 = 19. From 80 to 85, males 8 females 6 = 14. From 85 to 90, 

 males 1 females 1 = 2. 



