ERRATA, 
Page 60, note 2, omit “ Russian.” 
„ 62, note 2, should read “ The exact weight is 14650 kilogrammes — 14 tons, 8 cwt. 2 qrs.” 
„ 71, 20th line from top, for “ powder,” read “ power;” 
„ 71, 11th line from bottom, after “ greater ” insert “ than.” 
,, 79,2nd line from top, for “ Redsdale,” read “ Ridsdale.” 
„ 98, note 5, for “ almost exactly 9 ins. (9-1735 ins;),” read “ almost exactly 8£ ins; 
(8-779 ms.)” 
