INTRODUCTORY. 



cultivated, along with the actual art of manipulation and 

 observation. All actual observations should be carefully 

 and neatly booked as a test proceeds, for nothing tends so 

 much towards the nullification of test results than careless 

 and inaccurate notes. Such notes ought always to be 

 preserved in a fairly legible state, so that reference can 



easily be made to them at any time after the test has been 



j 



made. 



To the student of engineering, as well as to the 

 engineer, the preservation of such notes will almost always 

 prove of great service at future times, when he may be 

 very glad to turn to this storehouse of his for what may 1 " 

 most valuable pieces of information. Careful note should 

 be taken of any tests which may be unusual and specially 

 interesting. 



