To Mr. Partington, 1 may observe, you will soon be placed 

 under additional obligations, by a ^publication, upon an im- 

 proved and economical plan of the excellent Lectures of t 

 ble and self-instructed Philosopher, Ferguson; who may in some 

 degree be regarded as the first popular or elementary wntei 

 Natural Philosophy. This work, both on account of the original 

 matter, and of the very useful Notes furnished by its ingenious 

 commentator;, to connect it with the present improved state 

 science, I strongly recommend you to purchase, peruse, and assi- 

 duously study." 



DR. BlRKBECK. 



* Mr. Ferguson may in some degree be regarded as the first ele- 

 mentary writer on Natural Philosophy, and to his labours we mus 

 attribute that general diffusion of scientific knowledge among t! 

 practical mechanics of this country, which has in a great measu 

 banished those antiquated prejudices and erroneous maxims c 

 struction, that perpetually mislead the unlettered artist." 



DR. BREWSTER. 



/>// the same Autht;?, 



AN INTRODUCTION TO ELECTRICITY: 



With Copious Notes, and a Supplement ; 



Illustrative of the present state of Voltaic Electricity ant) 

 Electro Magnetism. 



