310 EIGHTH REPORT — 1838. 



ral classes, each of which again consists of numerous individual 

 specimens of iron, and are arranged as follows :^ 



Box, No. I. — Sunk in the clear sea water of Kingstown 

 Harbour, and containing: — 



Class, No. 1. — Welsh cast iron. Experiments, No. 1 to 13 

 inclusive, i. e. 13 specimens, different. 



Class, No. 2. — Irish cast irons. Experiments, 14 to 17. 



Class, No. 3. — Staffordshire and Shropshire cast irons. 

 Experiments, 18 to 25. 



Class, No. 4. — Scotch cast irons. Experiments, 26 to 57. 



Class, No. 5. — The standard bar of wrought iron. 



Class, No. 6. — Scotch cast iron, cast in green sand, and also 

 chilled. 



Class, No. 7. — Welsh cast iron, cast in green sand, and also 

 chilled. 



Class, No. 8. — Staffordshire cast iron, cast in green sand, 

 and also chilled. 



Class, No. 9. — Irish cast iron, cast in green sand, and also 

 chilled. 



Class, No. 10. — Mixed cast irons, various — Scotch and 

 Welsh, Irish and Welsh, &c. &c. &c. 



Class, No. 11. — Cast iron used by Messrs. Hodgkinson and 

 Fairbairn in their experiments, viz. Scotch, Welsh, Derby- 

 shire, Yorkshire, &c. &c. &c. 



Class, No. 12. — Mixed cast iron, suitable for fine finishing 

 in machinery, with the " skin" removed entirely by the planing 

 machine. 



Class, No. 13. — Hard gray mixed irons, protected by various 

 known paints and varnishes, viz. caoutchouc varnish, copal, 

 mastic, turpentine, asphaltum, white-lead paint, soft cement 

 (wax and tallow), Swedish tar, coal tar laid on hot, drying oil. 



Box, No. II. — Sunk in the foul sea water at the mouth of 

 the Kingstown sewer. 



Box, No. III. — Sunk in clear sea water, at temperatures 

 varying from 115° to 125° Fahr., in the Dublin and Kingstown 

 Railway Company's hot baths at Salt Hill. 



Box, No. IV. — Sunk in the foul water of the river Liffey, 

 within the tidal limits, opposite the Poddle river. 



Box, No. v.— Sunk in the fresh water of the river Liffey, 

 within the premises of the Royal Hospital, Kilmainham. 



All these boxes, viz. II., III., IV., and V., contain classes 

 of specimens co-ordinating with those before stated as con- 

 tained in No. I., consisting in all of about one hundred and 

 sixty separate and different specimens. 



It is intended to take up these boxes at determinate intervals 



