On the Production of Steam from heatrd Iron. 81 



RESULTS. 



1st Series. — Vaporized y oz. of water in 2100" — viz. 

 water was on the metal 1497" ^ 

 59 intervals 10.2" each 603" ^ 



Black at No. 19.— Minimum, No. 49. 



2d Series. — Gave ^-f oz. of vapor in 1800" — viz. 

 water remained on 1292.5' } 

 61 intervals 8.32" each 507.5" ] 

 Black at No. 21.— Minimum, No. 50. 



3d Series. — Gave ^ f'Z. of vapor in 1800" — viz. 

 water was on 1065.5" > 



67 intervals 10.9" each 734.5" \ 

 Black at No. 19.— Minimum, No. 42. 



4th Series. — Gave "^-^ oz. of vapor in 1920" — viz. 

 water was on 1092" ) 



72 intervals 11.5" each 828" \ 

 Black at No. 30. — Minimum, No. 29. (Surface oxidized.) 



5th Series. — Gave y Oz. of vapor in 2100" — viz. 

 water was on 1244.5" > 



79 intervals 10.8" each 855.5" ^ 

 Black at No. 31.— Minimum, No. 32. (Oxide.) 



6th Series. — Gave ^/ oz. of vapor in 2100" — viz. 

 water was on 1420 " ) 



91 intervals 7.47" each 680" ] 

 Black at No. 30.— Minimum, No. 47. 



7th Series. — 5_4 oz, of vapor in 2162" — viz. 

 water was on 1232" ) 



93 intervals 10" each 939"^ 

 Black at No. 29.— Minimum, No. 52. 



8th Series. — Gave YV <^^- of vapor in 2700" — viz. 

 water was on 1819"^ 



162 intervals 5.44" each 881" \ 

 Black at No. 38.— Minim-um No. 52. 



9th Series. — Gave VV o^- ^^ vapor in 2700" — viz. 

 water v/as on .. 1510" } 



172 intervals 6.91" each 11 90" \ 

 Black at No. 42.— Minimum, No. 75. 



The eighth series in the second course, is represented in projec- 

 tion by the curve, (Fig. 4.) of the accompanying plate. The reader 

 will remark that the linear unit, assumed to represent the minimum 

 lime and its corresponding quantity of vapor, is one tenth of an inch 

 in this figure, whereas it is two tenths in those which relate to the 

 first course. 



In addition to the results of the fourth and fifth series, where the 

 most rapid action occurred almost simuUaneously with the cessation 



Vol. II.— No. 1. 11 



