Parker, John R.  1777-1844. <br/><br/>
A treatise upon telegraphs :  embracing observations upon the semaphoric system, with a few remarks upon the utility of the marine telegraph flags / 
by John R. Parker. 
 - Boston :  Kidder & Wright,  1842. 
 - 16 p. :  ill. ;  24 cm. 
<br/><br/> Cover title. 
<br/><br/><label>LCCN: </label>ca 09002495  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph.<br/>Signals and signaling.
<br/><br/><label>LC Class. No.: </label>VK389  / .P2