[296], l. 14, for “R2R – 82,” read “R2Rg2.”

[303], art. 299, for “M. Leguire,” read “M. Seguin.”

[306], l. 2, for “R. R. & G.,” read “R. K. and G.”

[314], l. 2, for “D. R. Clark,” read “D. K. Clark.”

[320], l. 1, for “Railroad, three pounds (Pennsylvania),” read “Railroad (Pennsylvania), three pounds.”

[320], l. 7, for “coal,” read “coke.”

[331], near bottom, for “The area is, therefore,

Sides, twice length, etc.,read“Sides, twice length by height, etc.,
Back, twice height, etc., Back, height by width, etc.,
Front, twice height, etc., Front, height by width, etc.,
Top, twice length, etc.,” Top, length by width, etc.”

[334], l. 15, for “44.7 lbs.,” read “14.7 lbs.”

[335], l. 7, for “Railway Mechanics,” read “Railway Machinery.”