Figure 14. — Perkins's triangular-valve ship pump. Lower 

 figures show various views of the plunger. From Abraham 

 Rees, edit., The Cyclopaedia, American ed. (Philadclpia, 

 1822), plates vol. 3, "Hydraulics." 



legs, one of which, steel-pointed, as they went down 

 pierced through a boy's foot, pinning it to the ground. 

 This mishap had more effect on Mr. Perkins than a 

 total failure of his engine would have had, for he was 

 a kind, tender-hearted man. The boy was a novitiate, 

 who swung the censer in one of the Roman Catholic 

 chapels, and who, years after, when a priest in 

 Cincinnati, spoke to me feelingly of Mr. Perkins' 



great kindness and attention to him while laid up 

 with the wound that had lamed him for life. 



The "Dromedary" was run under a shed and never 

 brought out again. It was finally dismantled, a 

 regular air vessel replacing its spring piston. It was 

 sold as a stationary mill engine to a cotton factory, 

 to be worked by water-power. [8] 



25 



