OF SEVENTY-FIVE-MILE RANGE. 381 



To this I have repHed, that, although they may be nozv, they were 

 not when I read the paper, and even now are not so in the Navy. 

 In fact, when I inquired of a high naval authority how long it would 

 take to calculate such a trajectory, he repHed, "About two days." 

 I said that we did it with two men in an hour. 



Since then far better methods have been developed, but as I have 

 seen only one publication of a trajectory, viz., by Major J. Maitland- 

 Addison, R. A. (Journal of the Royal Artillery, Vol. XLV., No. 4), 

 which confirms my results, I publish the paper as read, in the inter- 

 est of the history of the matter, regretting that more pressing mat- 

 ters have so delayed the publication. 



