INTRODUCTION. 19 



and not liable to be mistaken or misapplied. There is no art, 

 profession, trade, or occupation, which can be taught or learned 

 without the use of technical words or phrases belonging to 

 each, and which, to the inexperienced and untaught, are as 

 unintelligible as the terms of science. It is not at all more 

 difficult to learn and remember the latter than the former, when 

 the attention has been properly given to the subject. The 

 seaman, the farmer, arid the mechanic soon become familiar 

 with the names and phrases peculiar to their several callings, 

 uncouth, and without apparent signification, as many of them 

 are. So, too, the terms of science lose their forbidding and 

 mysterious appearance and sound by the frequency of their 

 recurrence, and finally become as harmonious to the car, as 

 they are clear and definite in their application. 



