INSTRUMENTS 



OF 



ACCURACY * PRECISION 



ARE FULLY 



DESCRIBED AND ILLUSTRATED 



IN 



SCIENTIFIC INSTRUMENTS, 



VOL. I. 



THE PURE SCIENCES DEALT WITH : 



Magnetism, Electricity, 



Sound, Light and 



Heat, etc. 



CHEMICAL APPARATUS IS DEALT WITH 

 IN A SEPARATE VOLUME. 



THE ABOVE 



WILL BE FORWARDED FREE 

 TO 



PRINCIPALS, 

 PROFESSORS, 

 SCIENCE MASTERS, 



UPON APPLICATION TO : 



PHILIP HARRIS & Co., LTD., 



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BIRMINGHAM. 



