vi PREFACE TO THE FIRST EDITION. 



and of three other courses of lectures on the same 

 subject, delivered at the Royal School of Military 

 Engineering at Brompton Barracks, Chatham. 



Many new descriptions are treated of, and a great 

 number of experiments on the strength of timber are 

 given in detail as well as in the abstract. Further, 

 there are some useful notes on seasoning timber for 

 use, and the best means to be taken for its preser- 

 vation. 



THOMAS LASLETT. 



S8, Mar YON Road, Charlton, S.E. 

 September, 1875. 



